January 11, 2011
Lagoonas
Michael and I took a drive up Bofax road to the top of the ridge within Golden Gate Recreation area. Nice forests and COLD air. Great view of the Bolinas Lagoon and it's delta.
January 9, 2011
BT
Bushtit


Here is a good example of a molt limit in a bewick's wren wing. You can see a slight color difference between the shafts of the outer three large feathers (the primaries) and the inner ones. The outer feathers have a dark brown color to them, whereas the inner ones have a light brown color. The darker brown indicates newer feathers. When you can see two generations of feathers in a wing at this time of year, it generally means that this is a first year bird because as an adult it would have undergone a complete molt, and would not show any remaining older feathers.


Here is a good example of a molt limit in a bewick's wren wing. You can see a slight color difference between the shafts of the outer three large feathers (the primaries) and the inner ones. The outer feathers have a dark brown color to them, whereas the inner ones have a light brown color. The darker brown indicates newer feathers. When you can see two generations of feathers in a wing at this time of year, it generally means that this is a first year bird because as an adult it would have undergone a complete molt, and would not show any remaining older feathers.
Labels:
Bewick's Wren,
Bushtit,
landscape,
molt limit,
sunset
January 5, 2011
Towhees
California towee, with a single white feather on its head, which shouldn't be there.

Spotted towhee

Spotted towhee wing, showing a typical HY/SY molt pattern: fresh greater and lesser coverts, and tertials (black), and retained juvenile primaries, secondaries, and primary coverts.

Spotted towhee

Spotted towhee wing, showing a typical HY/SY molt pattern: fresh greater and lesser coverts, and tertials (black), and retained juvenile primaries, secondaries, and primary coverts.
January 3, 2011
RSFL
Good day at Pine Gulch on Michael's first day back. 25 birds with a couple good ones mixed in.
Myrtle warbler tail

Chestnut backed chickadee

Red shafted northern flicker



Anna's hummingbird

Myrtle warbler tail

Chestnut backed chickadee

Red shafted northern flicker



Anna's hummingbird

January 2, 2011
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