The call note is a chip, which Brewster calls “a soft tchip indistinguishable from that of parula americana.”
Occasionally, however, parasitic eggs are found in the dainty pensile nests of the parula Warbler.
parula was extensively used as the generic name during the last century, and is now reinstated to replace Compsothlypis.
This species is similar to the parula but is more extensively yellow below, and has black lores and ear coverts.
During this shower of warblers the parula was the most numerous species, excepting, perhaps, the chestnut sided.
Its song bears a marked resemblance to that of the parula and its call-note is said to be like the tchep of the Myrtle Warbler.
I have not seen enough material to trace subsequent molts and plumages, which doubtless parallel those of the parula warbler.