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

Sunday, June 26, 2011

New birding experiences

As I mentioned in my last post, I'm currently busying myself with spending as much time in the field as I can to collect data for my two blocks of Ohio's 2nd Breeding Bird Atlas. What a wild ride it's been! Taking part in this survey effort has driven home to me the fact that there's so much to be seen out there, if only we take (and make) the time to look for it.

One of the blocks that I have claimed for the atlas is very convenient for me. My property and a good portion of my road are within the block, so I already had a lot of data to report about species just from my own back yard and neighborhood. That being said, however, I have been happily surprised to uncover breeding evidence (mostly in the form of fledged birds begging for food from their parents) for a good number of species in my neighborhood (and on my property) just within the last 10-12 days. A partial list of these species includes Eastern Towhee, Blue-gray Gnatcatcher, Blue-winged Warbler, Ovenbird (that one was 20 feet from my front door - just outrageous!), Wood Thrush, and this little bird:

Please forgive the picture quality - the camera on my iPod is not very good. But look how cute! I found 2 of these little buggers peeping at me from a ditch at the side of the road one evening. I was positively stumped as to what the species might be, though, and there was no parental unit around to tend to it at the time that I spotted it, nor when I checked in on it again the next morning. Seeing mom or dad feeding it sure would have helped me figure out what it was! After some online searches and consultation with a friend, the verdict is: Red-eyed Vireo fledgling. It was literally within seconds of finding this little one that a young Wood Thrush and one of its parents flew across the road and landed in a tree, giving me two breeding confirmations in less than a minute. SUCCESS!

It's funny what a difference a year can make. Last spring I considered joining the atlas effort, and even met with our regional director to learn more about it, but between being committed to classes for OCVN and general lack of knowledge, I just didn't feel comfortable trying to participate last year. Having made it a point to better educate myself about bird ID both by sight and by sound since last spring, I feel pretty good about what I can contribute to the atlas now. I will admit that I was still a little hesitant about the whole thing when I signed up, though. I thought to myself a number of times "how am I going to find breeding evidence for all these birds?" - and I still wonder that each time I go out, despite having had a number of successful outings. But the answer is much easier than I would have imagined. Just let nature show you, and it becomes simple. Allow your instincts to guide you. Watch the birds and really pay attention to their behavioral cues - they will tell you exactly what is going on in no uncertain terms.

Sometimes it's a matter of watching a bird sally back and forth over a field and then return to a spot over and over. I found an Eastern Kingbird nest this way. Sometimes it's a hunch of "maybe I should walk over this way," which gets rewarded with a scolding from a bird, which leads you to find its nest in a tree. That was how I found this Orchard Oriole nest.

Roughly 8 feet off the ground in a very young sycamore tree, I was delighted to have this nest within easy reach of my camera lens (the few oriole nests I've seen before this have been located 20+ feet up in very huge sycamores, sometimes hard to spot even with binoculars). The Cornell Lab's All About Birds website describes the Orchard Oriole's nest as "An open cup of woven grass, lined with fine grass, plant down, wool, and feathers, suspended from fork of tree branch far out on limb."


Given the small size of this sycamore, there weren't very many limbs to go far out on, so she chose instead to stick this pretty much next to the main trunk. What I love about this angle is that you can see all those strands of grass coming down from the top which help to actually suspend the nest (although it seems to be getting support from branches underneath it, too).


Male and female Orchard Oriole, left to right.


This male Orchard Oriole is one that can present an identification challenge for birders who are still learning IDs, myself included! Had this not been pointed out to me in West Virginia a few months ago, I would have been stumped for sure. Adult male Orchard's are normally a deep brick red color, but this fella is just a youngun. He's a first year male (meaning he was born last year), and he's also referred to as a "bearded" male due to the black coloring along his throat. Next year he will molt into his brick red plumage, his wings and tail will go black, and his entire head will be black, not just his throat. It will be interesting to see if an Orchard Oriole pair comes back to this same site next year. If I see a brick-colored male there next year, I can make an educated guess that it's this guy.


Here's the female. She's the first one of the pair who caught my attention by making scolding calls at me and thus giving away her nest. She can be differentiated from a Baltimore Oriole female by her yellow-olive coloring - lady Baltimores have a definitive orange cast to them. In this image I think her resemblance to some of her other Icterid cousins is very obvious, especially that long, pointy beak. I should mention, though, that the Orchard Oriole's size is diminutive compared to a Baltimore Oriole. I didn't notice this until they took flight, and had a seen them only in flight, I might have actually mistaken them for some type of warbler.
"Icterid" is the taxonomic classification for the blackbird family, which includes grackles, cowbirds, meadowlarks, blackbirds (think Red-winged and Yellow-headed), orioles and the bobolink. Interestingly, the orioles are the only birds in this family who seem to have a form of the word "icterid" in their latin name. Orchard Orioles are Icterus spurius, while Baltimore Orioles are Icterus galbula. The word icterus means "jaundiced" or "yellowed" in Latin, very appropriate for a lot of birds who are boldly colored in yellow and orange!


I would say that the drab yellow coloring of this female helps to keep her out of sight under the right circumstances. Here you can see how she easily blends in with the leaves around her.

It's camouflage like this that was part of my concern about being able to spot nests and birds when I signed on for doing the atlasing. But as I said, the birds really do tell you all you need to know. It does take patience and open eyes, but it is amazing what you can see when you really LOOK! I never imagined myself as being one of those birders who drives around slowly and stops frequently to hop out of the car to look around or get a better listen. And yet, here I am - surveying birds and learning, learning, learning all along the way. I wonder what people think when they drive past this "crazy lady" with her binoculars? Most of them slow down, smile and wave, but a few drive by at break-neck speed with little regard for the pedestrian at the side of the road. It is those folks who I most want to tell, to shout at the top of my lungs, "There's newly fledged birds right over there, begging to be fed! They are so cute, and so amazing! They will migrate hundreds, maybe thousands of miles to South America in a matter of months! Isn't that incredible?!" Mostly, I just want them to slow down and take time to smell the roses - and look at the birds.

Thursday, August 26, 2010

A bird's labor (or: Anatomy of a Nest)

When construction of the guestudio was still in the early stages, a wonderful thing happened. As soon as the "bones" of the porch were up, a bird nest began to take shape in the rafters. I could not think of a more lovely christening of the building than that. It wasn't long before we found out that it was American Robins that chose this as their nesting area. I was quite surprised, actually, because I don't normally hear or see Robins up in our woods, at least not with much frequency.


Mama Robin, incubating eggs

Four eggs were laid in that nest, and as far as I could tell, 4 birds hatched. Unfortunately, we were gone on vacation during the time they were due to fledge, so I can only cross my fingers and hope that all 4 of them made it out successfully.


Mama Robin in a nearby Redbud tree, fluffing up a bit and asking me to kindly move away from her nest.

Fast-forward to mid-August. Construction has resumed on the guestudio after a hiatus, and the roof of the porch is finished with beadboard, closing off the space where the nest once was. Thank goodness our builders had a good enough sense about me to know that they shouldn't just toss that nest on the ground. Instead, they carefully removed it and placed it inside the building so I could have a look at it when I got home. Shortly after they relocated it I took it back outside and examined it. The architecture blew me away. For an animal with no opposable thumbs, this structure is nothing short of a miracle.


The nest, turned 180 degrees from its original orientation and settled on the porch railing so I could have a better look.

The following information about American Robin nest construction comes from the Cornell University's All About Birds website:
Females build the nest from the inside out, pressing dead grass and twigs into a cup shape using the wrist of one wing. Other materials include paper, feathers, rootlets, or moss in addition to grass and twigs. Once the cup is formed, she reinforces the nest using soft mud gathered from worm castings to make a heavy, sturdy nest. She then lines the nest with fine dry grass. The finished nest is 6-8 inches across and 3-6 inches high.


Dead grass - check


Rootlets - check


Twigs - check


Other material (part of a vining plant) - check


More "other material," strands of plastic, probably from the building construction - check


Lined with fine dry grass - check


"...soft mud gathered from worm castings to make a heavy, sturdy nest" - check


A strong, secure home in which to rear young - check. A beautiful sight to behold - you better believe it.

Tuesday, March 23, 2010

Welcome home, my Phoebe friends

Spring has sprung, and I am delighted to announce that our resident pair of Eastern Phoebes has returned to nest on the side of our house!

They are about a week behind schedule as compared to last year. I wasn't even sure they were going to nest in the same spot again. There was actually a curious Carolina Wren checking out and reshaping the old nest for a few days.


Not to worry, though. Once the Phoebes made up their mind that they would settle in this spot, they immediately set to work reshaping it into a bowl fit for the finest Phoebe fledglings. (Say that 3 times fast!) It has been interesting to watch over the past few days how it has really taken shape. Lots of moss has been added around the outside, and it seems more firmly anchored to the side of the house. It's a big nest, though, to be sure. I think this is the third year this nest has been recycled.


This is the first year we have been able to observe them via video from day one. A bonus from this early observation: the male and female spent time together at the nest during the first few days. Time spent together lasts very briefly, as evidenced by the fact that we first started watching them on Friday, and by Tuesday the female was the only one captured on video at the nest 90% of the time. Based on which bird is doing what, we think the bird that raises and lowers the feathers on his head is the male (we call him Don King) and the one who doesn't raise head feathers is the female. We came to this conclusion because Don King mostly stands around while the female does most of the work (not using human sexist views here - the female is responsible for nest building and for incubating the eggs, as noted on BirdHouses101.com).


I would think that all this back and forth, back and forth, must be exhausting on the female. In this video I feel kind of bad for her: she comes in carrying a rather large bug in her beak and starts in on a little bowl shaping, at which point she drops the bug and continues with renovations. To me it looks like the bug gets caught on the side of the nest, so I don't know if maybe she was able to pick it up later or if she truly just forgot about it.


I would expect egg laying to begin in a few days, so incubation will probably start in the next week or so. I'll be sure to keep you posted.

P.S. I submitted a bird-themed poem to a competition over at Daily Writing Tips (opens in separate tab/window) - it's titled "Lucky". Go over and check it out if you have a chance. If you like it, please let your voice be heard by voting for it. Or vote for any of the other 9 poems - they are all great. Thank you!

Friday, March 27, 2009

Lake Hope Heron update

I first mentioned the Great Blue Heron colony at Lake Hope a little over a month ago when the Great Backyard Bird Count was in full swing. At that time we located lots of nests far off in the sycamore trees, but no actual birds. Well, we've been back several times since then and have seen a handful of herons.

Unfortunately my meager 80-200mm zoom lens cannot even begin to approach acceptable pictures of these birds and nests that are so far off in the distance. Even when using a tripod, it's hard to get the camera to focus on the birds instead of one of the many branches that is between the camera and the birds. Instead, I just have to modify the photo to give you the general idea of "here are the nests, and, oh yeah, that's a heron."

Mr. (or Mrs.) skinny legs hangs out on the nest.

Our most recent visit to the colony/rookery/heronry was this past Sunday, right in the middle of the day (2:00, maybe), and I was actually surprised to find any herons around. I think there were 5 or 6 there, one of which was surely sitting on eggs because I could only see a head sticking out of the nest. There was also a grouping of them just kind of "standing around" at the top of a tree, but not really on a nest. It almost felt as if they were standing guard, but of what?

I messed with this picture quite a bit to try to show some of the coloring of the bird's underside.

Subsequent manipulation led to this interesting rendition.

Not sure how many more times we'll make it out there before the trees leaf out, but if we go again and see some activity, I'll let you know!

PHOEBE NEST UPDATE: Things at the nest have been pretty quiet lately. She seems to stop in only a few times a day, and very briefly at that. It would seem that nest construction is complete, but again, we still have no idea if she's started laying or not.