A truly welcome visitor both to the forest and the bird feeders, the Evening Grosbeak is a voracious eater so be prepared to watch your supply of sunflower seeds dwindle. They are a finch and will sometimes appear with American Goldfinch. It's hard to tell the female grosbeak from the winter plumage of the Goldfinch so check out the beak if you have a flock hit your feeders, but you'll know something is up just by the size of the flock. By the way "evening" has nothing to do with anything.The male is even more colourful with a dark head and yellow horns.
A few more facts:
1) In spring the beak colour changes from pale yellow to green the colour of new spruce buds.
2) They are natural predators of spruce bud worms.
3)They eat raw salt so you'll see them on roadways.
4) They inhabit mixed and coniferous forests, and can be seen across Canada and the US from west to east, but were initially a western mountainous bird.
For more Information the best site is http://www.hwww.ca/hww2.asp?id=40&cid=7
A post to http://camera-critters.blogspot.com/.