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Our GPS tracks and on-board videos show how peregrine falcons intercept moving targets that don't want to be caught.
Beginning in the fall of 2013, we frequently observed the resident female in the close company of one or more overwintering migrant male peregrine falcons.
Like the 1979 raft survey, our inventory was conducted during the late nestling stage for Peregrine Falcons (15-21 July, when young were about 30 days old).
Because they are a keystone species, peregrine falcons serve as a long-term vital sign that helps biologists monitor the overall health of the ecosystem and detect trends, including levels of contaminants.
However, Peregrine Falcons rarely responded to these calls.
This story recounts the author's experiences as a field biologist studying and protecting peregrine falcons at Chimney Rock, Colorado from 1975 through 1978.
e female peregrine falcon died in a quarry in Penmaenmawr in June.
Pigeon fanciers have in the past been accused of targeting peregrine falcons for killing their birds.
Because of the effects of the now-outlawed pesticide, DDT, few peregrine falcon chicks were hatching in the wild in the 1970s, which resulted in the breed's disappearance from much of North America.
Out of the 93 falcons, 5 Peregrine falcons and 5 Saker falcons were fitted with solar battery-powered satellite transmitters to monitor their flight paths and to gather scientific data about their survival rates.
In addition, samples from 472 migrating peregrine falcons (Falco peregrinus) trapped on autumnal and vernal migrations for banding purposes were also tested.
It is thought whoever is tying the pigeons up is trying to catch and kill peregrine falcons - a protected species.