Mate replacement and alloparental care in Ferruginous Hawk (Buteo regalis)

The Prairie Naturalist
By: , and 



Alloparental care (i.e., care for unrelated offspring) has been documented in various avian species (Maxson 1978, Smith et al. 1996, Tella et al. 1997, Lislevand et al. 2001, Literak and Mraz 2011). A male replacement mate that encounters existing broods has options, which include alloparental care or infanticide. Infanticide may be beneficial in some species (Rohwer 1986, Kermott et al. 1990), but in long-lived avian species, like the ferruginous hawk (Buteo regalis) that do not renest within a season, infanticide might be detrimental. Adoption and rearing success likely provide direct evidence of competence of replacement mates as potential parents for future seasons, a benefit that might outweigh the investment of time and effort associated with adoption and rearing (after Rohwer 1986). Anticipated mating opportunity at the cost of adoption (Gori et al. 1996, Rohwer et al. 1999) may explain step-parental benevolence and therefore, in such a scenario would enhance individual fitness through subsequent recruitment of related young.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Mate replacement and alloparental care in Ferruginous Hawk (Buteo regalis)
Series title The Prairie Naturalist
Volume 47
Year Published 2015
Language English
Publisher The Prairie Naturalist
Contributing office(s) Coop Res Unit Leetown
Description 2 p.
First page 36
Last page 37