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Now found annually in the Great Lakes and Atlantic Coast regions in November.
It has been proposed that it should be split into two species, but at present most authorities do not recognize this split:
Data from mtDNA suggest this split may be more appropriate if including citata from southern Mexico as a subspecies of P. pallida, and thereby essentially ending up with a western (P. pallida) and an eastern species (P. fulva).
Has been known to hybridize with the Barn Swallow and may be better included in the same genus, in which case it would become Hirundo fulva. If this is accepted, race pallida (or species, if following the split) must be renamed pelodoma, as the former name is preoccupied in the genus Hirundo. However, DNA data indicate that the genera Hirundo and Petrochelidon are not each others closest relatives.
Open areas near water.
The diet includes flying insects.
They nest colonially building a cup nest from mud, lined with grass. The clutch consists of 3-5 white eggs with dark spots.
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