Translator Disclaimer
1 July 2000 ALTERNATE DRUMMING SITE USE BY RUFFED GROUSE IN CENTRAL PENNSYLVANIA
Matthew J. Lovallo, David S. Klute, Gerald L. Storm, Walter M. Tzilkowski
Author Affiliations +
Abstract

We report on the use of alternate drumming sites by male Ruffed Grouse (Bonasa umbellus) during 1976–1997 within activity centers in a managed and an unmanaged forest in central Pennsylvania. Density of drumming males ranged from 1.6–12.5 males/km2 in the managed forest and from 1.7–7.6 males/km2 in the unmanaged forest. The proportion of males that used alternate drumming sites within activity centers ranged from 2% to 44% and was positively correlated with drumming male density. The number of alternate sites used within activity centers also increased with density; males used up to five alternate sites during a high-density year. Distances between alternate drumming sites and primary sites were not correlated with density but were greater on the unmanaged forest. The spatial orientation of multiple alternate sites relative to the primary site within each activity center suggested the use of alternate sites was a directional response. The actual direction of the response was not consistent among activity centers in the study area indicating it was not a result of prevailing abiotic factors such as wind, climate, or geomorphology. Similarly, the placement of alternate drumming sites was not directed toward nearest neighboring males. We discuss potential causes of the behavior, its adaptive significance, and implications to commonly used survey techniques for Ruffed Grouse populations.

Matthew J. Lovallo, David S. Klute, Gerald L. Storm, and Walter M. Tzilkowski "ALTERNATE DRUMMING SITE USE BY RUFFED GROUSE IN CENTRAL PENNSYLVANIA," Journal of Field Ornithology 71(3), 506-515, (1 July 2000). https://doi.org/10.1648/0273-8570-71.3.506
Received: 20 April 1999; Accepted: 1 July 1999; Published: 1 July 2000
JOURNAL ARTICLE
10 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

Share
SHARE
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top