Cats are Killing Millions of Birds

A newly published study by Environment Canada scientist finds free-ranging cats are the biggest killer of birds among human-related causes. The authors estimate 1.4 to 4.2 Million feral cats in Canada each killing 24 to 64 birds per year. An American study published in 2012 came to similar conclusions.  The open access article is available here. Avian Conservation and…

Cave Swallow Parents Recognize Their Babies.

Bird parents know which baby bird is theirs and show preferential bias toward them. PAYWALL Recognition of Young in A Colonially Nesting Bird Parents ought to restrict costly parental care to their genetic offspring and, particularly when the risk of misdirecting care is high, parent-offspring recognition may evolve. I tested whether adult cave swallows, which…