Search For The Swainson’s Hawk

When the Boise falcons are doing well and “just sitting around the nest”, one must try to find something else to keep them occupied. Let’s look for Swainson’s Hawks in East Boise. Report is: There are some spotted in the foothills. Trouble is, where? The photo to the left is of the Train Depot in Boise taken from the foothills east of town. (Left-Click on any photo to see full screen) But not is all lost. We did get this report form the Peregrine Fund,

12 May
Now four weeks old, the eggs will soon be hatching! It is exhausting work but the tiny chicks have biological tools especially for this process. One of these is called an egg tooth, a sharp structure that grows at the tip of the beak. The chicks use this “tooth” to pierce the membrane inside and the shell. This allows oxygen to flow into the egg and fill their lungs. Previously, oxygen and carbon dioxide were exchanged via blood vessels in the membrane, but now the chicks will start depending on their lungs to breathe. This stage of hatching is called “pipping.”

The chicks also develop a large muscle in the back of the neck, called a pipping muscle, which gives them the strength to chip their way out. Usually, hatching begins about 48 hours after pipping. The chicks will punch a dime-sized hole in the shell and then use their egg tooth to cut the shell in half, which takes about two hours. A few days after hatching, the egg tooth falls off and the pipping muscle disappears.

The adult birds know pipping is under way when they hear the chicks vocalizing from inside the eggs.

So there you have the latest from the Peregrine Fund. Here are some photos I took while in the foothills. Enjoy and thanks, Miss A, for letting me go with you.

Tulips in Miss A’s neighbors yard.

Wild Phlox in the foothills.

Beautiful little MacGillivray’s Warblers.

MacGillivray’s Warbler

MacGillivray’s Warbler

Sorry I am late on this post, but Blogspot was down for maintenance and it evidently took longer than they anticipated. All seems well, now. Keep Looking Up!


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