Hi Tweets,

I heard somewhere (don't remember where) that there are only two significant
differences between Northwestern Crow (NOCR) and American Crow (AMCR): one
is anatomical, that NOCR has 4 bands of transverse muscle across its syrinx
where AMCR has only 3, hence its deeper voice; the other, that rictal
feathering is species-diagnostically different.

Anyone know yea or nay to these things?

Michael Price
Vancouver BC Canada
michael_price at mindlink.bc.ca