BioOne.org will be down briefly for maintenance on 17 December 2024 between 18:00-22:00 Pacific Time US. We apologize for any inconvenience.
How to translate text using browser tools
19 October 2021 Flight call response is lower at dusk than during daytime in two parulid species
Michelle L. Gianvecchio, Mark E. Deutschlander, Sara R. Morris
Author Affiliations +
Abstract

Many passerines regularly use flight calls to communicate during migration. However, flight-calling is inconsistent throughout the day, with a markedly lower degree of calling by free-flying individuals during the early evening hours and with peaks in calling typically around dawn. Based on these observations, we hypothesized that individual flight call response would vary by time of day, and the likelihood to respond would be lower at dusk than during the daytime. We tested daytime and dusk flight call responsiveness of captive American Redstarts (Setophaga ruticilla) and Magnolia Warblers (S. magnolia) during spring migration at the Braddock Bay Bird Observatory (near Rochester, New York, USA). We played a conspecific flight call sound stimulus for individual birds placed inside a soundproof recording studio and recorded their acoustic responses. In our experiment, American Redstarts and Magnolia Warblers were significantly less likely to give flight call responses at dusk than the individuals tested during the daytime. The almost absent responsiveness to flight calls at dusk suggests that these species either minimally communicate with one another during take-off or do not use flight calls as a source of communication at this time. These results have important implications for detection and quantitative bioacoustics migration monitoring. They also demonstrate the need for additional studies in temporal flight-calling behavior.

Michelle L. Gianvecchio, Mark E. Deutschlander, and Sara R. Morris "Flight call response is lower at dusk than during daytime in two parulid species," The Wilson Journal of Ornithology 133(1), 22-33, (19 October 2021). https://doi.org/10.1676/20-00103
Received: 9 September 2020; Accepted: 8 April 2021; Published: 19 October 2021
KEYWORDS
avian communication
bioacoustics
flight-calling
migration
New World warblers
wood warblers
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top