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Documents disponibles écrits par cet auteur (17)
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Katrina Moeller, Auteur ; Gary Ritchison, Auteur
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Geoffrey M. Carter, Auteur ; Shawchyi Vorisek, Auteur ; Gary Ritchison, Auteur
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C. Adam Heist, Auteur ; Gary Ritchison, AuteurABSTRACT Nestling birds solicit food from their parents using conspicuous vocalizations and visual begging displays, and evidence suggests begging represents an honest signal of need that adults use to determine provisioning rates. Less is known[...]
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Erin E. Grabarczyk, Auteur ; Gary Ritchison, AuteurABSTRACT The alarm calls of some birds are functionally referential and may provide nestlings with information about the threat posed by potential predators. However, few investigators have examined the responses of nestlings in cavity nests to [...]
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Jason R. Courter, Auteur ; Gary Ritchison, Auteur
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Tyler E. Rankin, Auteur ; Gary Ritchison, Auteur
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Matthew D. Beckett, Auteur ; Gary Ritchison, Auteur
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Sagan Goodpaster, Auteur ; Gary Ritchison, AuteurIn species susceptible to mass-dependent flight costs, mass recession prior to fledging may ensure that fledglings have appropriate wing loading. Our objectives were to determine if mass recession by chimney swift Chaetura pelagica nestlings is [...]
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Gary Ritchison, Auteur ; Brandon T. Ritchison, Auteur
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Erin O'Brien, Auteur ; Gary Ritchison, Auteur
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Ryan S. O'Connor, Auteur ; Gary Ritchison, Auteur
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Mark R. Bostrom, Auteur ; Gary Ritchison, AuteurCarotenoid-based coloration of skin and plumage has been found to be correlated with individual quality in many species of birds during the breeding season. However, less is known about the possible role of these signals during the nonbreeding s[...]
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Jennifer Adler, Auteur ; Gary Ritchison, Auteur
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Gary Ritchison, Auteur ; Kimberly P. Little, Auteur
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Michelle L. Carder, Auteur ; Gary Ritchison, AuteurEastern Phoebes (Sayornis phoebe) persistently pump their tails when perched, and the function of this behavior is unclear. We tested four hypotheses concerning the possible functions of tail pumping, including the (1) balance hypothesis, (2) si[...]
