This gallery contains 4 photos.
Social Signaling A book I received for Christmas got me interested in melanins in bird feathers. Melanins are pigments found in most organisms. Their chemistry is complex and their functions in many organisms are not understood. In birds they are … Continue reading
An ecogeographical rule concerns itself with the variation of traits (mainly morphological) of an organism over geographical gradients. In 1833 Constantin Wilhelm Lambert Gloger (1803 – 1863), a German ornithologist and zoologist, proposed that within a species of warm-blooded animals, … Continue reading
While I watched a song sparrow (Melospiza melodia) feed along Ash Creek (Lassen County CA), a mountain chickadee (Poecile gambeli) flew down and joined the sparrow. The chickadee was only interested in getting a drink while the sparrow foraged. It … Continue reading
This gallery contains 4 photos.
I went back to Ash Creek (Lassen County CA) to again look for Clark’s nutcrackers (Nucifraga columbiana). None to be found! For about ten minutes I did watch a song sparrow (Melospiza melodia) feeding along the creek shore under the … Continue reading
