Juvenile Yellow Warblers give rapid high chip calls. Here the chips in the first 6 seconds of the cut are adult chips, followed by two flight calls and then by the calls of fledglings (Dark-eyed Junco singing, July, ME).
The calls of fledgling American Redstarts are very similar but slightly higher; juvenile begging and being fed by adult female (June, NJ).
Juvenile Black-throated Green Warbler metallic begging calls (July, ME).
Fledgling Blackburnian Warblers have a rapid, high, buzzy call (July, ME).
Black-throated Green and Blackburnian Warbler fledglings together for comparison (July, ME).
These Magnolia Warbler fledglings called mostly in triplets, the last note being lower (July, ME).
A juvenile Pine Warbler in the New Jersey pine barrens; the calls are relatively low (Jun).
Calls increase in rapidity to the point of being fed at 7 seconds (Aug, NJ).
Yellow-rumped Warbler juveniles sound similar but the call is more staccato (July, ME).
Black-throated Blue Warbler fledgling calls are similar but higher; note trills at the time of feeding (July, ME).
Juvenile Black-and-white Warblers have a hard typewriter-like call (note that these birds were not visualized. but I'm fairly certain of the identity).
Juvenile Chestnut-sided Warblers utter a soft chip that is used as a location call, and have a slurred begging call when a parent approaches (July, ME).
The softer chips are fledgling calls, the sharper, emphatic chips are by the adult male (July, ME).
both chips, adult on right
Adult-like calls by fledglings that were likely older (July, ME).
Canada Warbler fledgling, with lower chips by adult in background (July, ME).
Juvenile Ovenbirds have an extremely high-pitched twittering call (June, NJ).
Fledgling Worm-eating Warblers also have extremely high calls, very similar to Ovenbird but perhaps a little lower (June, NJ).
Juvenile Northern Parulas have extremely high-pitched, short chips (July, ME).
Juvenile Common Yellowthroats have a location call similar to the chip of adults (July, PA).
Calls speed up into the begging call when being fed (July, PA).
As is commonplace with fledglings, they fell silent when an adult bird called the alarm (July, PA).
Louisiana Waterthrush fledglings have a short trill-like call (May, NJ).
As is typical of fledgling calls, they speed up as the parent hands over food. The calls are similar to those of fledgling Chipping Sparrows.
A different, rising call.