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Article
Svana Rogalla, Auteur ; Matthew D. Shawkey, Auteur ; Liliana D'Alba, AuteurPlumage coloration can have substantial effects on a bird's energy budget. This is because different colours reflect and absorb light differently, affecting the heat loads acquired from solar radiation. We examine the thermal effects of feather [...]
Article
Svana Rogalla, Auteur ; Michaël P. J. Nicolaï, Auteur ; Viki Vandomme, Auteur ; Robin Teifel, Auteur ; Susana Clusella-Trullas, Auteur ; Liliana D’Alba, Auteur ; Matthew D. Shawkey, AuteurNest care and brooding in sunbirds (Nectariniidae) is thought to be performed exclusively by females. Here, we provide the first evidence that male sunbirds might help with brooding. During a ringing session in Hoekwil, South Africa, we observed[...]
Article
Liliana D’Alba, Auteur ; Matthew D. Shawkey, AuteurOne of the greatest threats to the survival of avian eggs is the risk of infection by microbes; as such, a large number of parental defense mechanisms have evolved in response to the decreased fitness imposed by microbial infection. The existing[...]
Article
Laura K. Estep, Auteur ; Matthew D. Shawkey, Auteur ; Geoffrey E. Hill, AuteurCarotenoid-based feather colouration is a classic example of a condition-dependent ornamental trait. In some species of birds, red, orange and yellow feather colouration reflects male quality and advertises the carotenoid concentration of feathe[...]
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Liliana D'Alba, Auteur ; Thomas Holm Carlsen, Auteur ; Arni Asgeirsson, Auteur ; Matthew D. Shawkey, Auteur ; Jón Einar Jónsson, AuteurInsulation is an essential component of nest structure that helps provide incubation requirements for birds. Many species of waterfowl breed in high latitudes where rapid heat loss can necessitate a high energetic input from parents and use down[...]
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Thomas Manna, Auteur ; Caren Cooper, Auteur ; Shane Baylis, Auteur ; Matthew D. Shawkey, Auteur ; Geoffrey I. N. Waterhouse, Auteur ; Tomáš Grim, Auteur ; Mark E. Hauber, AuteurConspecific brood parasitism (CP) is a facultative breeding tactic whereby females lay their eggs in the nests of conspecifics. In some species, potential hosts have evolved the ability to identify and reject foreign eggs from their nest. Previo[...]
Article
Lynn Siefferman, Auteur ; Matthew D. Shawkey, Auteur ; Reed Bowman, Auteur ; Glen E. Woolfenden, AuteurThe Florida Scrub-Jay is a monogamous cooperative breeder in which both males and females display extensive structurally based blue plumage. Juveniles of this species exhibit blue tail and wing feathers that they begin growing as nestlings, and [...]
