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This past fall I helped the Intermountain Bird Observatory band birds on a number of occasions at a site along the Boise River. I’ve returned to the location on occasion throughout the winter to bird, and every time I find a small mixed flock with banded individuals throughout.

The other day I made attempts to photograph banded birds to capture band numbers and identify individuals. Easier said than done when the flocks are busy foraging. I came away with some good photos, but nothing that put together a full sequence or even the last few digits.

It can be said, however, that these birds are most likely the same birds that were banded here in October. The other most plausible explanation is that some were banded at IBO’s other site, only a few miles away on the top of Boise Peak. I’m unfamiliar with the literature on winter movements of the Golden-crowned Kinglet, so I don’t have an idea if holding a small range throughout winter is common for this species. Still, the birds I photograph seem to be staying put which surprises me in some way. Perhaps the inclination of the flock to stay within a small range speaks to the quality and perhaps importance of the habitat provided by this relatively wild portion of Boise’s section of the river.

Time to read, and think some more.

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January 21, 2016

Black Rosy-Finch Use Cliff Swallow Nests to Roost

by Bryce W. Robinson

East of Boise, Idaho, on a cliffside along the Boise River is a conglomerate cliffside of volcanic rock. On this cliffside is a group Cliff Swallow (Petrochelidon pyrrhonota) nests. The Cliff Swallow is migratory, so during the winter months the Cliff Swallow does not occupy these nests.

In winter, the mud cavity nest sites are utilized by other bird species as roost sites. Interesting, to me, is that wintering Rosy-Finch species use these nest sites as well. I finally succeeded in capturing a video clip of a Black Rosy-Finch (Leucosticte atrata) entering a mud cavity to roost for the evening.

The composition of the flocks at this particular site are also of interest. Take a look at the eBird checklist of the time I spent filming this small flock. Most were Black Rosy-Finch, the next most numerous were “Hepburn’s” which are a coastal breeding subspecies of Gray-crowned Rosy-Finch, and there was only one “tephrocotis” Gray-crowned Rosy-Finch, the interior subspecies.

http://ebird.org/ebird/view/checklist?subID=S27027048

The regularity of this Cliff Swallow – Rosy-Finch relationship is of interest to me. I have read accounts of the behavior in California and Washington, but these accounts are few. I do not know of other areas that these birds currently use Cliff Swallow nests, but I will be searching for them and would appreciate any information from other’s observations.

Wintering ecology, what a fascinating faction of bird study.

September 6, 2015

Swallow-tailed Kite Movements

by Bryce W. Robinson

Swallow-Tailed Kite – Elanoides forficatus. 11 x 17″ prismacolor on bristol.

I illustrated this Swallow-tailed Kite for my friend Russ. He found Arizona’s first state record back in 2012, so understandably the Swallow-tailed is a special bird to him. You can see the accepted record here:

http://abc.azfo.org/ABCVote/_ABCReports_Public_View_list.aspx

It would be so exciting to see an unexpected X soaring high above the desert. Lately, Swallow-tailed Kites have been showing up in some odd places. For whatever reason a few birds have strayed farther north than their normal range. In this past weeks Rare Bird Alert on the ABA Blog, four separate sightings of the species were made in three different states: Illinois, Indiana, and Kansas. Sometimes birds make strange movements in great distances. You never know, you might be at a hawk watch this fall somewhere in the west and see a large X soaring in the sky. Better start scanning…

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August 12, 2015

Plumage in Transition: Red Phalarope Pre-Basic Molt

by Bryce W. Robinson

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I don’t often post a large amount of photos from one subject, but I think this bird deserves the coverage. I was birding the western Alaskan coastline with my friends Neil and Ellen the other day when we found this male Red Phalarope – Phalaropus fulicarius. Even better, the bird was mid-way through its pre-basic molt, giving it a unique look. This was the first time I’d ever seen this transitional plumage. REPH_1501

The new feathers of the basic plumage are blue-grey. The old feathers of the alternate plumage are gold and black. It’s a striking difference. Also note the orange body feathers of the alternate plumage, and the white feathers of the basic plumage. These birds are so colorful during their breeding periods on the pools of the Arctic tundra, but after this short period ends they molt into a cool plumage reminiscent of their winter haunts, the open ocean and coastlines. These color changes mean something, or better put, they have context. What a satisfying process, to see a bird in a state like this male and recall that the appearance has a story (begs the question, why the difference in appearance between seasons?).

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Although the bird was midway through its molt, it is still identifiable as a male. You can see in the crown that the retained feathers are brown and gold. If it were a female, these retained feathers would be wholly black, and bold. The gold and brown around the face and on the nape also tell its sex.
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This bird was so cooperative that I was able to take my fill of photos. It’s rare to see this species in a plumage such as this, so I’m happy that I was able to capture many different angles and views, truly document the bird, and even put the camera down and simply watch. I feel spoiled with the way the birding has been lately here in western Alaska. Too many great things to see, too may things to shoot with the camera, too many experiences to write about. Just the way life should be. REPH_1505 REPH_1504 REPH_1507 REPH_1509