Meet the Bald Eagles All of this year's were tracked last year in Journey North, too. The eagles Peter Nye tracks each year change slightly. Satellite transmitters eventually lose their signals and we bid the birds good-bye. New eagles join the research group. Some are captured as adults and others as immatures. Some are even fitted with satellite tags while they are still in the nest! Adults Eagle # Gender Date Captured Capture Story/Photo Capture Location V98 Female 2004  (March 9) Capture Story Upper Delaware River (southeast NY) U21 Female 2006 (Jan 15) Photo Upper Delaware River (southeast NY) U25 Female 2006 (Jan 25) Photo Upper Delaware River (southeast NY) Click to view Upper Delaware River site U27 Female 2006 (Feb 1) Photo Upper Delaware River (southeast NY) All in a day's work: Attaching satellite transmitters (PTT's) to immature Bald eagles (nestlings).