the yellow-bellied flycatcher (empidonax flaviventris) is a small insect-eating bird of the tyrant flycatcher family .
adults have brownish-olive upperparts , darker on the wings and tail , with yellowish underparts; they have a white eye ring , white wing bars , a small bill and a short tail .
the upper part of the bill is dark; the lower part is orange-pink .
their breeding habitat is wet northern woods , especially spruce bogs , across canada and the northeastern united states .
they make a cup nest in sphagnum moss on or near the ground .
these birds migrate to southern mexico and central america .
yellow-bellied flycatchers wait on a perch low or in the middle of a tree and fly out to catch insects in flight , sometimes hovering over foliage .
they sometimes eat berries or seeds .
the yellow-bellied flycatcher's song can be transcribed as a rough , descending "tse-berk ," which can be similar to the more common least flycatcher's snappier , more evenly pitched "che-bek .
", but is identified by the duration between the two songs(four seconds opposed to one) .
the three primary call notes of yellow-bellied flycatcher are a clear , ascending "chu-wee ," a sharp , gruff "peekk", and a soft , descending "pyu .
