Identifying Lesser and Greater Yellowlegs
There are two yellowleg species regularly found in the United States and Canada. Both species nest in northern Canada and into Alaska. Both migrate south in the winter to all three coasts and into Mexico. The Great Yellowlegs is more widespread in the winter, but both species are generally common during migration and in their winter ranges.
The two species are very similar in appearance but can be told apart with a little experience.
The above photo shows both yellowleg species.
The bill of the Greater Yellowlegs is sometimes slightly curved upward, a feature not shown well in this image of a Greater Yellowlegs. In winter-plumaged birds, the bill is two-toned.