Grassland birds orient nests relative to nearby vegetation.(Author Abstract): An article from: Wilson Bulletin
Book Details
PublisherWilson Ornithological Society
ISBN / ASINB0008DSGTQ
ISBN-13978B0008DSGT8
AvailabilityAvailable for download now
MarketplaceUnited States 🇺🇸
Description
This digital document is an article from Wilson Bulletin, published by Wilson Ornithological Society on December 1, 2002. The length of the article is 4506 words. The page length shown above is based on a typical 300-word page. The article is delivered in HTML format and is available in your Amazon.com Digital Locker immediately after purchase. You can view it with any web browser.
From the author: We studied orientation of nest sites relative to nearby vegetation for dabbling dueks (Cinnamon Teal, Anas cynaoptera; Blue-winged Teal, A. discors; Gadwall, A. strepera; Mallard, A. platyrhynchos; and Northern Shoveler, A. clypeata) and Short-eared Owls (Asio flammeus) in ungrazed grassland habitat during 1995-1997 in westcentral Montana. We estimated an index of vegetation height and density in intercardinal directions (NE, SE, SW, NW) immediately around nests. All species oriented nests with the least vegetation to the southeast and the most vegetation to either the southwest or northwest. Furthermore, maximum vegetation around nests shifted from the southwest to the northwest with increasing nest initiation date, apparently as a response of individuals tracking seasonal change in the afternoon solar path. Thus, nests were relatively exposed to solar insolation during cool morning hours but were shaded from intense insolation in the afternoon throughout the breeding season. We suggest that nest m icrohabitat was selected in part to moderate the thermal environment.
Citation Details
Title: Grassland birds orient nests relative to nearby vegetation.(Author Abstract)
Author: Steven T. Hoekman
Publication:Wilson Bulletin (Refereed)
Date: December 1, 2002
Publisher: Wilson Ornithological Society
Volume: 114 Issue: 4 Page: 450(7)
Article Type: Author Abstract
Distributed by Thomson Gale
From the author: We studied orientation of nest sites relative to nearby vegetation for dabbling dueks (Cinnamon Teal, Anas cynaoptera; Blue-winged Teal, A. discors; Gadwall, A. strepera; Mallard, A. platyrhynchos; and Northern Shoveler, A. clypeata) and Short-eared Owls (Asio flammeus) in ungrazed grassland habitat during 1995-1997 in westcentral Montana. We estimated an index of vegetation height and density in intercardinal directions (NE, SE, SW, NW) immediately around nests. All species oriented nests with the least vegetation to the southeast and the most vegetation to either the southwest or northwest. Furthermore, maximum vegetation around nests shifted from the southwest to the northwest with increasing nest initiation date, apparently as a response of individuals tracking seasonal change in the afternoon solar path. Thus, nests were relatively exposed to solar insolation during cool morning hours but were shaded from intense insolation in the afternoon throughout the breeding season. We suggest that nest m icrohabitat was selected in part to moderate the thermal environment.
Citation Details
Title: Grassland birds orient nests relative to nearby vegetation.(Author Abstract)
Author: Steven T. Hoekman
Publication:Wilson Bulletin (Refereed)
Date: December 1, 2002
Publisher: Wilson Ornithological Society
Volume: 114 Issue: 4 Page: 450(7)
Article Type: Author Abstract
Distributed by Thomson Gale
