Compassion Science Species 
10,000 Birds
APRIL 5, 2022
per cent of individuals of a species at a given time” and a vagrant bird as a bird that shows up outside of this range (p. There are many more factors than I imagined: compass errors, wind drift, overshooting, extreme weather and irruptions, natural dispersal, and human-driven vagrancy. other compass senses like the stars?–and
10,000 Birds
MARCH 4, 2011
Among these white-headed/dark-winged gulls formerly lumped into the genus Larus , there were 18+ recognized species the last time I checked, sharing similarities that make telling them apart for the amateur birdwatcher very difficult. 1998), then the proper name for this species is L. fuscus – should be separated as species.
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10,000 Birds
MAY 17, 2012
David Dickman, in the April 26th Science Express , write: Many animals rely on the Earth’s magnetic field for spatial orientation and navigation. Le-Qing Wu and J. However, how the brain receives and interprets magnetic field information is unknown. If so, is anyone looking for this? If not, why not? Get to work people!
10,000 Birds
MARCH 18, 2011
The field site I am assigned to is located in one of the most diverse ecosystems in the world and home to a particularly rich avifauna that numbers well over 500 species. Hundreds of riotously colored birds representing 14 species of macaws and parrots flock and frolic together in less than fifty meters of forest canopy.
10,000 Birds
MAY 19, 2011
Even if you don’t live in the summer range of a particular species, you may have opportunities to observe it while it passes through, especailly if you live in an active flyway, like I happen to. It turns out that humans without compasses make no use of magnetic fields.) The birds do the flying for you. Well, not really.
10,000 Birds
MARCH 14, 2011
Hunting sandhill cranes in Kentucky is a bad idea from a public relations standpoint, considering the growing cadre of birders and nature enthusiasts for whom cranes are a touchstone species. Initiating a hunting season on a large, charismatic species like a crane is no way to resuscitate hunting.
10,000 Birds
MARCH 20, 2011
It may be as sick as deliberately targeting an endangered species for death. Birders know that the light’s not always perfect or even particularly good when you’re trying to tell one species from another. Speculation is useless in acts of vandalism. It may be as simple as trying to hit the big white one. The big white one. It flies on.
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