It's a very interesting find Karen. I'd imagine voice is the biggest clue
(more so than plumage).
As far as I know these two species are not naturally sympatric anywhere,
so singing the 'wrong' song is more likely to be indicative of some form
of hybridity than an example of 'learning'.
It's
It's a very interesting find Karen. I'd imagine voice is the biggest clue
(more so than plumage).
As far as I know these two species are not naturally sympatric anywhere,
so singing the 'wrong' song is more likely to be indicative of some form
of hybridity than an example of 'learning'.
It's
