hey tweets and kelly,

in my experience, house finches do not eat black oil sunflower
seeds, whereas many other "desirable" species do. selective seed
presentation appears to be the best solution to this issue.

hope this helps,

Devorah A. N. Bennu, PhD
Chapman Postdoctoral Fellow
Molecular Systematics Laboratories
Department of Ornithology
The American Museum of Natural History
Central Park West at West 79th Street
New York, NY 10024-5192
212.313.7784 (office) 212.313.6962 or 212.313.7773 (lab)
email:nyneve at amnh.org or nyneve at myUW.net
work page http://research.amnh.org/ornithology/personnel/bennu.htm
personal pages http://research.amnh.org/users/nyneve/