Hutton's vireo are our only year round vireo. They are found in the coniferous forests here in Metro Vancouver singing loudly during the mating season. It takes a little bit of time before I was able to tell the difference between this dull green-gray bird and this other green-gray bird, the Ruby-crowned kinglet. With a name like "Ruby-crowned" you think that wouldn't be a problem, but the crown only comes out on certain occasions. Three things to look for are, wider thicker beak, less jittery movements, and the feet are the same color as the legs, blue-grey.