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Backyard Birding in the Rio Grande Valley of South Texas:
Surrounded by great birding destinations, our favorite patch is still the backyard (or the front), where we've seen more than 270 species of birds. Sit awhile, and watch the river and yard with us!




Showing posts with label nests. Show all posts
Showing posts with label nests. Show all posts

Wednesday, June 16, 2010

"for every Bird a Nest"




The story of the yard in June is always a story of nesting.  I haven't been outside as much in the last two weeks as I was during migration (the heat index is over a hundred by late morning) but I have been looking out the windows, and even from limited views the nesters can be seen going to and fro or overlooking their nests from a high branch.

Some of these busy nesters remind me of a poem by Emily Dickinson in which she wonders why ("wherefore" in her archaic 19th century English) a little wren continues its search for the perfect nest spot, even though there's one in every tree:


For every Bird a Nest --
Wherefore in timid quest
Some little Wren goes seeking round --

Wherefore when boughs are free --
Households in every tree --
Pilgrim be found?   
. . . .

(click the link above for the whole poem)

Watching a pair of Brown-crested Flycatchers, I'm thinking the same thing.  Why continue the exhausting quest in search of the perfect spot (as though on some sort of pilgrimage) when there are perfectly fine nesting spots everywhere and every bird seems to be guaranteed one.  Why all the fuss, just build the nest! get on with it already!!

Really, I'm just kidding.  I love watching birds search all around for the best place to build.  They seem so human.  I can just imagine what they could be thinking.  

I'm fairly certain this is the same pair of flycatchers that so steadfastly built and tended a nest in April and May,  even though they disappointingly (at least for me) seem to have raised Bronzed Cowbirds instead of flycatchers.  Watching from the front deck for a few days last week was entertaining.  Here (photo on right) one looks over the dead cottonwood stump that has already this spring proved a successful home for European Starlings (though, really, who needs more of those to compete with our native cavity-nesters?) and Golden-fronted Woodpeckers.  (The woodpeckers had chiseled out quite a few holes in the two old cottonwoods during the winter--a few in our house, too! Golden-fronted wp's are the contractors who provide housing for several species.)

Here (left) the lively brown flycatchers  flutter excitedly over the birdhouse that's already been used by Brown-crested Flycatchers for many years.  Though not a great photo, it does capture the flurry of activity as they "quest" for that perfect spot. 




Flycatchers are not the only birds on a quest for the perfect nest in our June yard. These Black-bellied Whistling Ducks, if not still searching out nesting places, are certainly searching for something.

In tall Washingtonian Palm trees they look high...

they look low....


Once called Tree Ducks, these guys favor the palms and sometimes even sit on the electrical lines.  Every day we watch them on our dock, preening and sunning themselves.  And early in the morning, before the heat is oppressive, we watch their pilgrimage.  Emily would certainly be wondering the whys and wherefores of their constant search.

The Northern Mockingbird nest in the neighbor's small Anacua tree that a few weeks ago contained a single nestling (see posts from May) was empty by early June without my seeing any newly fledged Mockingbirds. The quick glimpse I had one day of a nestling with dark feathers was too brief to say for sure it was a cowbird. 

[I'll repeat again my disclaimer about bothering nests.  It is something I am super careful about.  I don't want to  move branches to get closer looks or disturb the nesters.] 

Two weeks ago the neighbors discovered a mockingbird going in and out of the Cenizo shrub that is less than ten feet from the Anacua where the first mockingbird nest was. (Cenizo is the native "purple sage" that blooms so beautifully across the river a few days after a summer rain.  Its ashy-green foliage and soft purple blooms  decorate the wild thorny brush along the Arroyo Colorado and are often used in landscaping.)

I think this second nest, fastened like the first to  forking branches about four feet above the ground, may have been built by the mockingbird that sang day and night during the time the other pair were nesting. (See this post for a picture of that nest site.)

It surprises me that the nests are so close together.  The neighborhood gossip in me is starting to speculate.  Did the pair, to make up for the first possibly cowbird-infested nest, start a new one nearby before the cowbird had left home?  Or is this a case of Big Love (one of my favorite television shows) where one male has actually two adjacent homes and two ladies?   Hmmmm.   (I read an interesting article the other day, while throwing out old birding magazines, that cited DNA studies showing supposedly monogamous nesters sometimes having multiple mates.  Some males father broods with more than one female and sometimes eggs in one nest have more than one male parent. )

Whatever the parentage, nestled in the cup of coarse twigs, lined with finer vines and palm tree fibers, were six eggs, four of them light blue blotched with reddish brown.  According to my nest book  (Nests, Eggs, and Nestlings of North American Birds by Paul J. Baicich and Colin Harrison) those are indeed mockingbird eggs.  Hooray!  Unfortunately,  two more eggs were the pale blue-white of the Bronzed Cowbird. (No adult mockers were in sight, so my neighbor removed the two interloper eggs which, being tall,  he could do without touching the nest or the branches.)

A couple of days ago the eggs began hatching. The state bird of Texas, once again, is increasing in number!   And the neighborhood cats are running for cover as the Northern Mockingbirds begin their assault.  My hope is that the intense heat as well as the protective instincts of the birds will keep the cats indoors where domestic cats belong. 



I've been promising a photo of a Hooded Oriole nest and finally have one.  Woven of the finest materials, soft gold fibers from the palm tree, this is a nest I think Emily would call "of twig so fine," an achievement she guesses the wren aspires to.

On a frond of a Washingtonian (non-native) Palm tree, this nest is in the usual kind of tree for a Hooded Oriole but is not typical because it is on the top, not the underneath, side of a dried, not a green, palm frond.  The day following our discovery of the nest, high winds twisted the leaf so that the lovely little woven nest is now out of sight.  I was concerned that the winds would blow down the dried frond, but luckily it's still there, more hidden now from the marauding Bronzed Cowbirds. Woven of fibers pulled from the leaves and bark of the tree, the nest is perfectly camouflaged. 

Hooded Orioles, like Emily's nest-questers, seem always to be in search of a more perfect "household" even though every palm tree looks to my un-oriole eyes to be a perfectly good place. At least twenty palms are in--or within a short distance of--our yard, and at least two pairs of the little orioles continually fly from palm to palm.  I suspect the building of superfluous nests is a reaction to the overabundance of Bronzed Cowbirds.



I'll note just a few more of the active nests:

Another of our common nesters, Great-tailed Grackles, typically build large nests of twigs and weeds, sometimes several in the same tree or nearby trees. The one in the photo above is in our lovely blooming Retama tree.  Others are in an Ash tree and several are in two Live Oaks. The nests are usually pretty high in the trees and are apparently vulnerable to large birds of prey that fly over the yard, judging by both the fact that  Harris's Hawks have already raided a nest of young birds this spring,  and also by the reaction of adult grackles when vultures, hawks, and even gulls fly over the trees.  

The Turkey Vulture being chased by the grackle here was followed closely by a Black Vulture that was likewise harassed by the protective parents.  Male grackles don't seem to help build or sit on nests, but they do keep watch and go into action when necessary!


Curve-billed Thrashers have fledged already from the nest in the native Spanish Dagger Yucca.  You can tell this is a young bird because its spots are smaller, its bill slightly shorter, and its eye pale yellow rather than orange.  Curve-billed Thrashers have always nested in our yard and have had as many as three broods per year.  I've found their nests in several kinds of native trees including Negrito, Esperanza, and even one year in a metal Purple Martin house.  The house was no longer occupied by martins because it had become overgrown by small trees.


                                                                   
The last photo is of one of the Couches' Kingbirds that are nesting in a Live Oak tree. Their dawn song, longer and slower than their other calls and songs is one of my favorite sounds of a spring morning.

Our small Rio Grande Valley yard is filling up with more and more nests.  In such a place where "boughs are free --- / Households in every tree," our spring birds could indeed be described as a " throng -- /  Dancing around the sun." 




Wednesday, April 28, 2010

Yard Watch

If I spend a lot of time outdoors--and who wouldn't with migration in full swing?--I don't have much time for adding to my blog.  But since I set up this blog to keep track of what's happening in the yard, I will write quickly tonight and show a few pictures. (If I'm tempted to tell stories or get too long-winded, I'll cut it short. Tonight it's just the news. )

First, you may have noticed that I changed the photograph  behind the blog's title above.  The Black-bellied Whistling Ducks are just so much fun to watch that I wanted them to look over the page. (See this earlier post for other photos.) Every morning they stand or sit on the railing of the deck by the river, waiting for the neighbors to put out seed.  Today while my husband fished on the dock, I walked  up the stairs to the deck where the ducks had  perched, to within  ten feet of them, and they didn't move -- until I started talking too loudly and they flew in their awkward way to the next dock.

I'll be happy to see the ducks bring their family along with them later in the summer.  I'm not sure where the nest is--they are still spending much of the day here, so they may not have a nest yet.  Last summer I thought maybe they had nested on top of a neighbor's old shed where they spent a lot of time.   

Other nesting news:  Northern Mockingbirds have completed a nest in a small Anacua tree in the yard just to the east.  Another pair of mockingbirds are close by, perhaps in the yard to the west.    Brown-crested Flycatchers still take dried grass into a small hanging bird house though its proximity to the garage makes them nervous. The Altamira Orioles, Hooded Orioles, and Kiskadees are relatively quiet, not much movement in and out of the nests.  That may mean  they are sitting on eggs.  Of course, cowbirds keep close watch on all and harass them continually.  Green Jays  today followed each other around the tree canopy over the driveway, ruffling up their feathers and almost snuggling.  I know of no nest yet, but there must be one close by.  A pair of Northern Cardinals are also eating at feeders in the yard off and on all day.  They are certainly nesting nearby also.  The Curved-bill Thrashers are probably sitting on eggs by now in their nest in the neighbor's yucca. 

Every morning, a large male Wild Turkey flies over from across the river to walk around (and gobble) in the yard .  Today he flew to an entry deck behind the house, not far from where Brad was fishing on the dock.   They gobbled at each other for a bit  (I wonder what the bird thought of the fisherman)  and then the turkey moved around the house to stroll the driveway.  Brad also saw bottlenose dolphins this morning feeding in the river.  I'm hoping to catch them in a photo soon.  The dolphins are  one of my favorite things about the river.

The last few days have been good  ones for watching spring migrants.  Six new species have been added to the 2010 Yard List since Monday.   (The list is to the right in the sidebar.  I always set the recent additions in red.)


A beautiful male Rose-breasted Grosbeak has been in the yard for a couple of days.  He's not eating the orange half that's in the photo, of course--that's for the five species of orioles, Great-tailed Grackles, Green Jays, and woodpeckers.  He's partial to the sunflower seeds.  That's a picture of a grosbeak female to the right. These birds are a little skittish and shy at first, but once they find a feeder with large striped sunflowers, they settle in and eat for as long as there's still seed.  I think their large seed-cracking beaks make them look comical.

Female and juvenile Rose-breasted Grosbeaks look similar to the male Black-headed Grosbeaks we sometimes have in the winter. (Look at this post for a photo of last January's first-year male.)

 (Yesterday was actually a two-grosbeak day when a Blue Grosbeak flew in very briefly.  Rust-red wing bars distinguish it from the very similar Indigo Bunting. ) 



The best migrant news is that the Painted Buntings are here.  Monday I saw a male fly out of the drive and across the road to  the patch of weeds beside the sorghum  field. I watched from the deck for awhile, and when it didn't appear again, I walked to the end of the drive and was lucky enough to get photos.  Not great photos --- since they were taken from across the road, but any picture of a Painted Bunting, even if fuzzy and small, is fun to look at--just like the birds.  So brightly colored with red breasts, blue heads and wings, red eye-rings and green backs, these birds do not look real but like they were drawn by a child with a brand new box of crayons. 

                                                                  
In the picture on the left, a second bunting hides behind another.  Until I downloaded the photo to my computer,  I thought I had seen  just one bird!  Arching above the birds in the picture is a seed-head of guinea grass that had grown up around a stand of century plants. An invasive plant that gardeners around here battle continually, guinea grass is tenacious and tough to pull up.  If you let it grow too long (if you're a lazy gardener like me) you have to dig the clumps out of the ground with a shovel.  I know I shouldn't,  but I let them go to seed when the buntings are migrating because that's where I always see the beautiful birds-- in the untidy clumps of grass in my yard.  (I guess pulling a few in my yard wouldn't help much anyway since across the road there's plenty of it. )

Yesterday was actually a two-grosbeak day when a Blue Grosbeak flew in very briefly.  Rust-red wing bars distinguish it from the very similar Indigo Bunting.  I hope I have a chance for a photo if it returns.


Not all the birds of the yard are as brightly colored as the Painted Bunting. But the eye of the Bronzed Cowbird is as red as the bunting's brightest feathers. Look at the ruff of feathers around this guy's neck that he can puff up when he really wants attention. (If it were not late as I write this, I'd talk more about this amazing ---but not beloved-- bird.  I'll put that off for another time when I'm not just giving a yard report.) 

Other new birds I've seen and added to the 2010 Year List since my last report :  Western Kingbirds perching at the top of the Royal Poinciana ; a  Swainson's Hawk soaring high above the fields; and a  Willow Flycatcher  making quick forays over the driveway to catch bugs from a perch in a mesquite.  (The flycatcher obligingly sang  as it flew away so that I could tell it was a Willow and not an Alder. Usually I have no idea which of those two little flycatchers I'm seeing.)

Well, that's the end of this installment of the backyard report.

To borrow from Garrison Keillor:  That's the news from  the Arroyo Colorado...where all the women are strong, all the men are good-looking and all the birds are above average.



Tuesday, April 20, 2010

Summer Homes

Another favorite yard bird made it home for the summer.  Yesterday morning when I looked out in the yard, Brown-crested Flycatchers were up early checking out the nest box where they've nested for years. But today, they had claimed a different bird house very close to the deck.

The bird in the photo above looks pretty dapper, crest under control, but my husband usually remarks that these guys look like they are having a bad-hair day  In this photo that usually unruly crest looks pretty smooth, like it's had a good conditioning treatment.

All day (well, when I wasn't counting warblers and orioles--more on that later)  I watched the flycatchers building their nest.  They had large "beak-fulls" of grass and other plant material and worked at stuffing it into the house. (One time when cleaning out an old nest  I found a piece of snakeskin in it--but it appears they are building this one of dried grass and small twigs.)

I wonder if they chose their spot too quickly.  In the picture here you can see their house hanging from a fiddlewood shrub/tree (middle of photo) that is very close to the deck where I spend a lot of time.  I spent most of the day today walking in the yard and driveway,  looking at the fabulous migrants that were making rest-stops here, so I wasn't on the deck.  When I did sit out there briefly, I think the flycatchers were disturbed that I was so close.  If I'd thought they would use this box, I wouldn't have put it so close to the house. We'll see how it works out.

Nest update:  The Altamira Orioles' nest is completed, an amazing feat of engineering.  I am trying not to look at it too often, though that's hard since it's so fascinating.  It hangs down from one of our Live Oak trees over the driveway next door to the west.  The house there is for sale starting tomorrow (the neighbor's house, not the Altamira Oriole's) so there will probably start being a little more human activity that I hope won't upset the birds.  (I am nervous about the house being for sale and hope that the new buyers will be bird-friendly. If I were wealthy I'd buy the beautiful lot and trees myself.)
The Curve-billed Thrashers have a nest in the yucca (Spanish Dagger) at the end of the driveway of the neighbors to our east.  I think theirs is completed.  I don't know if there are eggs yet and of course I won't get close enough to look.  Both birds are always close by.
The Kiskadee nest in the Ebony tree is complete.  It is just a tree or two away from the Altamira Oriole's nest.
After reporting on several suspected nest sites for the Black-crested Titmice  I can now say that I have no idea where they are actually nesting!
We have two pairs of Hooded Orioles that appear to be building nests in the Palm trees though I'm not sure which ones.  I still see them visiting all of them.  I think one pair is building in a tree near the road and one in a tree on the river side of the house.

Today was an absolutely wonderful day for watching migrants.  In fact, it was an eight-warbler, four-oriole day!  The Mexican Olive tree is in full bloom and is filled with orioles.  I had worried that the orioles wouldn't stop by this year since our Bottlebrush trees bloomed a month ago, but the Mexican Olives make up for the faded Bottlebrushes!

Here are Orchard Orioles feeding on the blooms.  The first one is a first year male.  Note its green head, black face, and the two spots of red on its breast. The yellow will be replaced by brick red in the adult and the head will be all black.  The photo of the adult Orchard Oriole doesn't show off the bird so much as the Mexican Olive tree (Anacahuita) with its white funnel-shaped flowers and soft velvety leaves.
 The female Hooded and Orchard Orioles look very much alike.  I use "context clues" to tell me which is which.  For example, the one that is eating from the olive tree was probably an Orchard Oriole because that's where the Orchard Orioles were.  The second female oriole photo is most likely a Hooded.  She was in the Retama tree near the Palm where they are nesting. She is interested in nesting and checking out the palm trees; the female Orchards are interested in eating for a day or two before resuming migration.

I was hoping today would be a five oriole day, but the Bullock's Oriole we saw Thursday was not still around.  So Altamira, Hooded, Orchard, and Baltimore graced the yard today.  But I'll take a four-oriole day any time!

What can be more fabulous than a four-oriole day?  An eight-warbler day! 


Before we left town last Thursday we had seen very few migrating warblers in the yard.  I knew from Texbirds, however, that birders were seeing them on the Island,  so when we returned home on Sunday evening, I  headed for the yard.  By the time I reached the end of the drive, a  Kentucky Warbler had flown in for a bath  and a Blue-winged Warbler flitted across the driveway.  A good omen, I thought.

But yesterday, no warblers!  It was a good day in lots of other ways (we added nonwarblers to the 2010 yard list:  Chimney Swifts and Common Nighthawks flew over the yard; a Yellow-billed Cuckoo, black and white tail streaming, flew into the smaller brasil tree, home perhaps for the summer; and the  Brown-Crested Flycatchers arrived to start their summer work of raising a family.)


 Today more than made up for the warblerless frustration of yesterday.  We had eight warbler species by the time the afternoon was over.  Of course most were too high in the trees or too skitterish to capture in photos, but I can see them each clearly in my mind's photos (which are never out of focus or underexposed).

A Northern Parula flitted into the fiddlewood behind one of the birdbaths.  Its green back and yellow breast with that reddish band made  a colorful spot in the cloudy grayness of the morning.  A Yellow-throated Warbler popped up in my binoculars as I was scanning  a palm leaf for a Hooded Oriole. A Black and White Warbler scurried up and down the tallest oak tree in the front-yard bird garden, along with a Cerulean Warbler that I thought for awhile was another black and white.  It was high in the tree, silhouetted against an overcast but brightening sky.  (That's it in the photo to the right.  Too bad its cerulean blue back isn't showing, but the white belly and throat with the side stripes and neckband are nice.)   A  Worm-eating Warbler  scurried around in the leaves by the saucer bath and then across the driveway.  A Yellow Warbler and a Blue-winged Warbler busily searched for insects in a tangle of Esperanza and Mexican Caesalpinia trees in the bird garden. A Canada Warbler skittered in the tree tops.



By the time the day was drawing to a close, the skies had cleared.  Look how the evening sun illuminates the crests of the Cedar Waxwings.  Someone farther north is waiting for them to return to nest in their summer home.

Thursday, April 1, 2010

Harris's Hawks and Mystery Nests

When I walked out to the end of the driveway a couple of mornings ago, I found two Harris's Hawks balancing on the electric wire, each of them grasping the thick wire with just one strong yellow talon.  What handsome hawks these are!  In addition to bright yellow talons, they have bright yellow ceres and eye rings that contrast with deep brown heads.  White feathers at the tip and base of the tail also stand out, and chestnut shoulders, wing linings and "leggings" add distinction to this striking bird. Next to the White-tailed Hawk,  which also has chestnut shoulders, these are my favorite neighborhood hawks. For years I could always see a nest at the top of a mesquite tree in an area of mesquite brush across and just up the the road.  Broken by Hurricane Dolly, the tree is now short and twisted and didn't have a nest last year. I don't know where the hawks  are nesting now.  I watched them watching the drive for a few minutes before they flew off across the cotton field and disappeared. 

 I seldom see Harris's Hawks flying or perching just one at a time.  Young hawks often remain with their parents for a few years and may even help raise new broods.  They  hunt together in twos, threes,  or small groups.  I've seen them hunting cooperatively  and then sharing their catch, perhaps a rabbit, ground squirrel, or wood rat.  Later in the summer,  when the young have fledged, family groups hunt in the fields across the river or across the road. Young hawks look like adults except for brown streaks on the breast, wings and tail.




Speaking of nests, Great Kiskadees are rebuilding one in a three-way fork near the top of an Ebony tree in our yard.  They built the large spherical grass nest last spring, but over the winter it was blown to bits by the wind.   About a month ago only a few pieces of grass remained,  but now it's almost as big as last summer's nest. Here's a picture I took yesterday.  The nest appears a  little loose and has gaps, obviously not finished yet. The bird in the photo sits on top of the nest instead of in it, but  when it's completed,  a side entryway will lead to an enclosed nest .

I've read that Kiskadees sometimes take almost a month to finish building these big football-shaped nests.  I can see how that could be--they keep taking time out to call loudly to each other, display their gold crests, and even tumble in the air as I saw them do yesterday.  Their name comes from their loud call of  "kiskadee!" but I think it just as often sounds like "oh, boy!" or "kiss, kiss, kiss a boy!  kiss a boy,  kiss a boy!"  The Kiskadee has also been called the Derby Flycatcher because of its black and white "hat."

Here's another photo, this one taken as a Kiskadee was calmly sitting on a branch this winter.  It seems they are never calmly sitting these days as they swoop up to their nest and down to the baths, calling and displaying the hidden gold crest at the top of their heads.  I like this picture because it shows that line of gold, the edge of mouth and the back beak which is bright gold, contrasting with the black beak and thick black eye line. 

The first time I saw a Kiskadee, I had first heard it calling loudly outside my classroom when I had just begun teaching at Harlingen High School.  Though in the middle of a discussion, I ran to the door, and saw two boisterous Kiskadees fly into an Ash tree in the courtyard.  Between classes I hurried down to the library for a field guide that identified the bright yellow and rufous bird with its black and white "hat."  We had only recently moved to the Valley,  and after seeing this spectacular bird just outside my classroom door, I knew we would stay here for the rest of our lives!  (I also begankeeping a field guide on the shelf beneath the classroom window and beside the window posted a list of birds seen from the room.  Over the years the list grew and I've had former students tell me they became interested in birds after being in my class. I didn't teach science, but literature --  but I guess if they see a teacher run outside at the call of a bird, they get an idea of how enthusiastic some birders can be.

Another large nest appeared suddenly in a Hackberry tree in December after the leaves had all fallen off the tree. Of course it had been there all along, but the leafy hackberry hid it well.   At first I thought it was a squirrel's nest because it was so large and covered with leaves, but the leaves that had apparently accumulated in our brief "fall" soon blew off, leaving a woven nest made of twigs and some palm fibers, not as messy as a squirrel's nest. (I'm not an expert on any nests, really, so I could be wrong about this.  I have never seen a squirrel near it, though,  so I finally concluded it was a bird's nest. Our squirrels usually nest in the palm trees or an owl box until we chase them out.) Anyway,  I don't know what  built the nest---and I'm surprised I didn't see it last summer since it is very near the upstairs back porch.  All winter, Green Jays stashed corn kernels in it (click on the photo if you can't see the corn),  but it has no inhabitants this spring. Could it have been built by Green Jays? So far, it's still a mystery.

Every winter when the foliage is thinner, I find nests and wonder how I missed them when they were inhabited.  I guess I'm not always a keen observer, not what you would call hawk-eyed.  About a month ago I found four nests in a small Brasil tree out near the end of the driveway, right underneath where the two hawks were perched yesterday.  Three of the nests were constructed of small twigs, probably  doves' nests, and one is a small woven one that looks a lot like the ones the Hooded Orioles build in palm trees. I've got an order in to Amazon.com for a nest guide book which should help my investigation into just who might have constructed these old nests.

This nesting season I want to keep better track.   I need to do a census of the inhabitants of our yard. That's a good resolution for today--April 1, 2010--Census Day. It's too early yet to do a nesting census, but  it's something I intend to do. I'll be careful not to disturb the nesters, but no nest will escape my keen observation:  I'll be hawk-eyed.