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Full-Text Articles in Behavior and Ethology
Age And Sex Differences In Stopover Behaviours And Flight Performance In Black-Throated Blue Warblers, Patricia Rokitnicki
Age And Sex Differences In Stopover Behaviours And Flight Performance In Black-Throated Blue Warblers, Patricia Rokitnicki
Electronic Thesis and Dissertation Repository
Differential migration by sex and age is commonly observed in passerines. Previous studies have found differences in wing morphology between sex and age classes which could affect their movement ecology. In this thesis, I examine whether migratory stopover duration and nocturnal flight speeds differed between age and sex classes in 89 Black-throated Blue Warblers (Setophaga caerulescens) using movement data obtained by Motus Wildlife Tracking System and meteorological data from the NCEP/NCAR Reanalysis II project. Second year birds (hatched during the previous breeding season) had longer stopovers but similar post-departure movements to after second year birds (hatched before the last breeding …
Behavioural Mechanisms Of Protandrous Spring Migration In A Nearctic-Neotropical Songbird, Jessica E. Deakin
Behavioural Mechanisms Of Protandrous Spring Migration In A Nearctic-Neotropical Songbird, Jessica E. Deakin
Electronic Thesis and Dissertation Repository
Most seasonally migrating songbirds have a protandrous migration pattern, meaning that males arrive to the breeding grounds before females. The proximate mechanisms that underlie this pattern are largely unknown for most species. In this thesis, I evaluate the behavioural mechanisms of protandry in the black-throated blue warbler (Setophaga caerulescens) using onset of migratory restlessness as a proxy for departure from the wintering grounds, migratory restlessness intensity as a proxy for motivation to fly, and stopover duration of radio-tagged birds. The onset of migratory restlessness and stopover duration was similar in both sexes. Males displayed higher intensity wing whirring than …