Juvenile House Wrens (with adult alarm, June, PA).
Carolina Wren fledgling (Aug, PA).
Another Carolina Wren fledgling, showing a surprising variety of calls (American Robin in background, July, PA).
Juvenile Sedge Wren calls are similar to the chip calls of the adults, but huskier (calling bird not seen, Sep, PA).
Golden-crowned Kinglet fledglings have a constant high chipping call (July, ME).
Calls speed up at the time of feeding.
Blue-gray Gnatcatcher fledgling begging for food (July, PA). The call is higher and wheezier than the adult call (BNA).
This is a recently fledged American Robin (Jun, NJ).
American Robin fledglings, location calls (July, PA).
Calls by another fledgling American Robin, showing the variety of sounds they make (July, PA).
High buzzy calls (with adult puk).
Quiet grating call.
Fledgling Wood Thrushes have chip calls similar to the alarm calls of American Redstart or Yellow Warbler. Faint buzzy contact calls of the nearby adult, similar to the flight call, can be heard at intervals (June, PA).
Same young bird with faster calls as it gets fed by an adult.
This older juvenile Wood Thrush has a slurred call similar to some fledgling American Robin calls (July, PA).
Veery fledglings (June, PA).
Fledgling Gray Catbirds have a surprising variety of calls.
Here are two commonly heard calls, a short tsip and a more pronounced tsup (July, PA).
The tsip calls increase in rapidity as a parent brings food (Jun, PA). Northern Cardinal fledglings consistently call in rapid bursts, whereas young Gray Catbirds speed up only when being fed.
Featured here are the tsip begging call, a kinglet-like trill, and some calls that seem to be intermediate.
tsip begging call and trill
Clearer see calls.
A louder tssup call.
Brown Thrasher fledgling location calls are thrush-like (July, PA).
Brown Thrasher begging calls, single fledgling with an adult (July, PA)
Calls speed up at time of feeding
Northern Mockingbird juveniles have a discordant pipe-like call (with adult calls, June, PA).
The familiar calls of fledgling European Starlings (July, PA).
Begging trills of juvenile Cedar Waxwings (July, PA).
(sonagram has vegetation artefact)
Compare with the almost identical begging calls of an adult female (requesting food from its mate, June, NJ).