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22 September 2022 Typical Polygyny and Cooperative Polygyny in Ridgway's Hawk (Buteo ridgwayi)
Christine D. Hayes, Marta Curti, Gabriela Diaz, David L. Anderson, Thomas I. Hayes
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Abstract

Avian mating systems are often monogamous, although polygamy in the form of both polyandry and polygyny are regularly employed by some species and opportunistically practiced by others. Among raptors, multiple species within the genus Buteo have been documented using either polyandrous or polygynous strategies. Here, we describe the first known cases of polygyny in Ridgway's Hawk (B. ridgwayi), a small forest hawk endemic to the island of Hispaniola. This raptor has been studied since the mid-1970s, and intensively during the last 20 yr. Ridgway's Hawks are generally considered to be monogamous; however, we report here observations of polygynous behavior in a recently established, wild population. We consider these polygynous breeding events opportunistic responses that display behavioral flexibility that may serve to benefit the conservation of this critically endangered raptor.

Los sistemas de apareamiento de las aves son a menudo monógamos, aunque la poligamia en forma de poliandria y poliginia es empleada regularmente por algunas especies y practicada de manera oportunista por otras. Entre las rapaces, se han documentado múltiples especies dentro del género Buteo que utilizan estrategias poliándricas o poligínicas. Aquí describimos los primeros casos conocidos de poligamia en B. ridgwayi, un pequeño gavilán de bosque, endémico de la isla La Española. Esta rapaz ha sido estudiada desde mediados de la década de 1970 y, de manera intensiva, durante los últimos 20 años. Esta especie es generalmente considerada monógama; sin embargo, aquí mostramos observaciones de comportamiento poligínico en una población silvestre recientemente establecida. Consideramos que los eventos de reproducción poligínica que documentamos son respuestas oportunistas que muestran una flexibilidad de comportamiento que puede servir para beneficiar la conservación de esta rapaz en peligro crítico de extinción.

[Traducción de los autores editada]

© 2022 The Raptor Research Foundation, Inc.
Christine D. Hayes, Marta Curti, Gabriela Diaz, David L. Anderson, and Thomas I. Hayes "Typical Polygyny and Cooperative Polygyny in Ridgway's Hawk (Buteo ridgwayi)," Journal of Raptor Research 56(4), 423-429, (22 September 2022). https://doi.org/10.3356/JRR-21-71
Received: 29 October 2021; Accepted: 1 June 2022; Published: 22 September 2022
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KEYWORDS
breeding behavior
Buteo ridgwayi
mating system
monogamy
polygamy
reproduction
reproductive strategies
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