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).
Prairie Warbler is similar but a little harder (June, PA).
A juvenile Pine Warbler in the New Jersey pine barrens; the calls have a prominent trill component (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 lower and more staccato (July, ME).
Black-throated Blue Warbler fledgling calls are higher, and if this recording is typical, more rapid; note trills at the time of feeding (July, ME).
Juvenile Black-throated Green Warbler begging calls are metallic (July, ME).
These birds called in triplets, the third call being similar to Black-and-white Warbler, the next species (July, ME).
Juvenile Black-and-white Warblers are similar but have a harder typewriter-like call (Worm-eating Warbler chipping, June, NJ).
(these birds were not visualized, July, ME)
Fledgling Worm-eating Warblers are similar to Black-and-white but are higher (June, NJ).
The calls of fledgling American Redstarts are soft and high; juvenile begging and being fed by adult female (June, NJ).
Canada Warbler fledgling chips are similar (lower chips by adult in background, July, ME).
Juvenile Ovenbirds have an extremely high-pitched soft call, often a twittering (June, NJ).
A different looking call by a newly fledged Ovenbird running along the ground, but still very high pitched (June, PA).
Fledgling Blackburnian Warblers have a rapid, high, buzzy call (July, ME).
Black-throated Green and Blackburnian Warbler fledglings together for comparison (July, ME).
Magnolia Warbler is similar to Blackburnian; these fledglings called mostly in triplets, the last note being lower. The calls are almost identical to those of fledgling Northern Cardinals (July, ME).
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).
Juvenile Northern Parulas have extremely high-pitched 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.
The Blue-winged Warbler juvenile call is a high, fine buzz (not visualized, July, NJ).