Contrasting long‐term trends in age‐specific survival of Peregrine Falcons (Falco peregrinus) in Britain using smoothed estimates of recovery probabilities

Ibis ◽  
2021 ◽  
Author(s):  
Robert A. Robinson ◽  
Mark Wilson
Keyword(s):  
Falco Peregrinus ◽  
Peregrine Falcons ◽  
Long Term Trends

Long-term trends and sources of organochlorine contamination in Canadian Tundra Peregrine Falcons, Falco peregrinus tundrius

1996 ◽  
Vol 93 (2) ◽  
pp. 109-120 ◽  
Author(s):  
Robin M. Johnstone ◽  
Gordon S. Court ◽  
Adrian C. Fesser ◽  
D.Mark Bradley ◽  
Lynn W. Oliphant ◽  
...  
Keyword(s):  
Falco Peregrinus ◽  
Peregrine Falcons ◽  
Long Term Trends

Long-term investigation of the degree of exposure of German peregrine falcons (Falco peregrinus) to damaging chemicals from the environment

2004 ◽  
Vol 146 (1) ◽  
pp. 34-54 ◽  
Author(s):  
Peter Wegner ◽  
Gert Kleinst�uber ◽  
Frank Baum ◽  
Friedrich Schilling
Keyword(s):  
Falco Peregrinus ◽  
Peregrine Falcons

A morphological model for sexing nestling peregrine falcons (Falco peregrinus macropus) verified through genetic analysis

2007 ◽  
Vol 34 (1) ◽  
pp. 54 ◽  
Author(s):  
Victor G. Hurley ◽  
Fiona Hogan ◽  
John G. White ◽  
Raylene Cooke
Keyword(s):  
Sexual Dimorphism ◽  
Genetic Analysis ◽  
Morphological Characteristics ◽  
Morphological Differentiation ◽  
Falco Peregrinus ◽  
Peregrine Falcons ◽  
Morphological Model ◽  
Degree Of Certainty ◽  
Reversed Sexual Dimorphism

Adult peregrine falcons (Falco peregrinus macropus) have monotypic plumage and display strong reversed sexual dimorphism, with females significantly larger than males. Reversed sexual dimorphism is measurable among nestlings in the latter stages of their development and can therefore be used to differentiate between sexes. In the early stages of development, however, nestlings cannot be sexed with any degree of certainty because morphological differentiation between the sexes is not well developed. During this study we developed a model for sexing younger nestlings based on genetic analysis and morphometric data collected as part of a long-term banding study of this species. A discriminant function model based on morphological characteristics was developed for determining the sex of nestlings (n = 150) in the field and was shown to be 96.0% accurate. This predictive model was further tested against an independent morphometric dataset taken from a second group of nestlings (n = 131). The model correctly allocated sex to 96.2% of this second group of nestlings. Sex can reliably be determined (98.6% accurate) for nestlings that have a wing length of at least 9 cm using this model. Application of this model, therefore, allows the banding of younger nestlings and, as such, significantly increases the period of time over which banding can occur. Another important implication of this model is that by banding nestlings earlier, they are less likely to jump from the nest, therefore reducing the risk of injury to both the brood and the bander.

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