Hi Tweets

Swainson's Thrush has an agitation-call which can sometimes sound quite
similar to Northern Bobwhite, a real problem where there have been
introductions of bobwhite. But the quail seems to have the purer call where
Swainson's Thrush seems to have more flute/vibrato in its call. If I had to
verbalise it, it would be something like:

Bobwhite: 'Per-Whiiite!' or 'Whiite!' (pure whistle)
Swainson's Thrush: 'Quaiite!" or 'Graiite!' (fluted)

God, that looks ghastly, but there is a difference. Hope that helps.

Michael Price
Vancouver BC Canada
loblollyboy at gmail.com

Every answer deepens the mystery.
- E.O. Wilson
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman1.u.washington.edu/pipermail/tweeters/attachments/20100723/a6cfdbdb/attachment.htm