10,000 Birds
JUNE 16, 2018
in the USA, a 2013 article states , the number reaches 3.7 There is a cat curfew for domestic animals in some states and a cull has been instigated to try to reduce the number of feral felines, currently estimated at 2 million. billion bird deaths. They rely on cover from which to launch their hunting attacks.
10,000 Birds
MARCH 19, 2013
This was proposed as an example of what we now call “stabilizing selection” … variation is constantly introduced into populations, but every now and then “selective forces” culls the variation out. The new study is about Cliff Swallows ( Petrochelidon pyrrhonota ) in southwestern Nebraska. because of collisions with vehicles.
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