Endangered Falcons are Doing Well this Year!
by Ben Wurst, Habitat Program Manager
So far this has been a good year for peregrine falcons. Almost all known nest sites have produced young, even the natural nests on the New Jersey Palisades, which are prone to failure from strong winds and driving rain associated with Nor’easters in early spring. One successful site is at Bayside State Prison. The nest there is on top of a 120′ water tower. The pair of falcons nests in a nestbox that was installed several years ago after a old hacking tower was decommissioned on the coastal saltmarshes along the Delaware Bay. For the past two years the site has been active and productive. This year two young eyases were produced (one was produced in 2014). Last week we joined Kathy Clark and John Heilferty with the NJ Fish and Wildlife’s Endangered Species Program to band the two young falcons.
We climbed the 120′ tower to access the nest and band the young. As we climbed the tower the adult female was calm but as we got to the half way point she became aggressive towards us to defend her nest and young. We were wary of her the whole time and spent as little time as possible on the tower while banding the young to minimize the stress to her from constantly flying and dive bombing us, which she did. We were lucky to have a steel railing to protect us (and helmets), as she came very close to us. At times she would perch behind me or John on the railing. Once we were done banding we climbed down and she returned to her nest to find that her young were not harmed.
Banding is a critical tool for avian biologists to learn a lot about birds. For New Jersey falcons we tag them with a black USGS federal band and a bi-color / alpha-numeric band, which allows us to be able to identify each individual bird. It also provides more valuable information including nest success, age, site fidelity, and the turnover rate in the population. At all nest sites in New Jersey, after we have successfully identified the breeding pair, we continually monitor each nest or eyrie until the young are old enough to band (approximately 3-4 weeks old). In 2014 there were 29 active nests in New Jersey (up from 26 in 2013). The core of the population continues to nest on towers and buildings throughout the state.
Ben W. and John H. climbing the 120′ tower. Photo By Kathy Clark/ENSP
Ben prepares to band a nestling that John holds. Photo by Kathy Clark/ENSP
Dive bombed! Yes, the female came very close to us! Photo by Kathy Clark/ENSP
Two 3.5 week old young. One male; one female. Photo by Ben Wurst
John Heilferty, ENSP Biologist holds a 3.5 week old peregrine falcon as it was banded for future tracking.
Ben Wurst climbs down the 120′ water tower. Photo by John Heilferty/ENSP.
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