Wednesday, August 25, 2010
Black-throated Green Warbler
The Black-throated Green Warbler's spring song is distinctive and easily learned by beginning birders. On its northern breeding grounds, one male sang 466 songs in an hour. This species is thought to be monogamous. Silent males, however, have been observed within another pairs' territories, which may indicate that extra-pair copulations occur (Morse and Poole 2005). Genetic testing of siblings would indicate if such shenanigans were taking place.
Posted by Dan Tallman at 9:59 AM