next message in archive
no next message in thread
previous message in archive
previous message in thread
Index of Subjects
Index of Subjects Ian I just re-read the Winter 2006 edition of Nova Scotia Birds. Do you still have the original of the cover. I am sure many birders have not seen this spectacular photo of Chimney swifts during "Wilma". Your report is also of current interest. Would you post the photo on RBA or face book Cheers JoanW -----Original Message----- From: naturens-owner@chebucto.ns.ca [mailto:naturens-owner@chebucto.ns.ca] On Behalf Of iamclar@dal.ca Sent: Saturday, July 23, 2011 3:41 PM To: naturens@chebucto.ns.ca Subject: [NatureNS] Chimney Swift roosts Steve et al.: Here's the skinny on mass roosts of Chimney Swift from "Birds of North America On-line" (available by subscription). "Some nonbreeding individuals remain in communal roosts throughout the summer, and individuals that do not renest after nest failures during the season often join these roosts ([refs given]). These flocks coming and going from large chimneys in summer are sometimes mistaken for a colony of many breeding pairs ([ref. given]). In fact, large flocks of nonbreeding birds (as many as 40 individuals) are known to roost in a chimney occupied by a single breeding pair ([ref. given]). The nonbreeding nature of these roosts was proposed early in American ornithology but has been little studied (Wilson 1812). Sex and age composition of these flocks is unknown." I knew something of this, but was surprised to note that a pair may nest in roost chimneys - I imagine this would be daunting in the Robie Tufts chimney in Wolfville.
next message in archive
no next message in thread
previous message in archive
previous message in thread
Index of Subjects