Built in June on the fork of a horizontal conifer branch near the trunk at low to moderate height, the yellow-rumped Warbler’s nest contains 3 to 6 eggs. Polytypic (6 ssp.). Length 5.3".

In Spanish and French, this bird is called the "orange-throated warbler" which might relate more to its appearance. The blackburnian's call is more like a squeak. Kapinos says many warblers ...