We are in the peak of the yellow-rumped warbler’s migration north to its breeding grounds (northern New England, Canada and Alaska). While its winter plumage is quite dull, its breeding plumage is very colorful. If you don’t spot one or more of these warbler flying from a branch to snatch an insect in mid-air, you might well hear the male’s softly whistled warble or trill. ( To hear the song of the yellow-rumped warbler, go to http://www.allaboutbirds.org/guide/Yellow-rumped_Warbler/sounds. The myrtle race is most common in New England.) Yellow-rumped warblers often inhabit coniferous woods, where they build nests that are frequently lined with ruffed grouse feathers.