Spring passage and arrival patterns of American Redstarts in Michigan's eastern Upper Peninsula.(Report): An article from: The Wilson Journal of Ornithology
Book Details
PublisherWilson Ornithological Society
ISBN / ASINB002HMJOQ0
ISBN-13978B002HMJOQ0
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from The Wilson Journal of Ornithology, published by Wilson Ornithological Society on June 1, 2009. The length of the article is 5246 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available immediately after purchase. You can view it with any web browser.
From the author: We examined the pattern of American Redstarts (Setophaga ruticilla) migrating through and arriving in breeding areas in northern Michigan to evaluate factors that may influence arrival of redstarts. Variation in arrival schedules coincided with variation in endogenous and exogenous factors. Redstarts arrived 3 to 7 days later during a year characterized by cold temperatures and low resource abundance as compared to years in which environmental conditions during the arrival period were more benign. Further, males verified as breeding at our site arrived 2 to 4 days before breeding females while males classified as migrants preceded migrant females by 4 days. Finally, older birds preceded younger for both verified breeders (7 days) and migrants (6 days). These findings demonstrate behavioral plasticity within the constraints of optimal migration theory which places high value on early arrival in breeding areas. Our results suggest that some species of long-distance migrants may adjust spring migration rates in response to environmental conditions.
Citation Details
Title: Spring passage and arrival patterns of American Redstarts in Michigan's eastern Upper Peninsula.(Report)
Author: Robert J. Smith
Publication:The Wilson Journal of Ornithology (Magazine/Journal)
Date: June 1, 2009
Publisher: Wilson Ornithological Society
Volume: 121 Issue: 2 Page: 290(8)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
From the author: We examined the pattern of American Redstarts (Setophaga ruticilla) migrating through and arriving in breeding areas in northern Michigan to evaluate factors that may influence arrival of redstarts. Variation in arrival schedules coincided with variation in endogenous and exogenous factors. Redstarts arrived 3 to 7 days later during a year characterized by cold temperatures and low resource abundance as compared to years in which environmental conditions during the arrival period were more benign. Further, males verified as breeding at our site arrived 2 to 4 days before breeding females while males classified as migrants preceded migrant females by 4 days. Finally, older birds preceded younger for both verified breeders (7 days) and migrants (6 days). These findings demonstrate behavioral plasticity within the constraints of optimal migration theory which places high value on early arrival in breeding areas. Our results suggest that some species of long-distance migrants may adjust spring migration rates in response to environmental conditions.
Citation Details
Title: Spring passage and arrival patterns of American Redstarts in Michigan's eastern Upper Peninsula.(Report)
Author: Robert J. Smith
Publication:The Wilson Journal of Ornithology (Magazine/Journal)
Date: June 1, 2009
Publisher: Wilson Ornithological Society
Volume: 121 Issue: 2 Page: 290(8)
Article Type: Report
Distributed by Gale, a part of Cengage Learning
