From: flora.fauna at live.com
To: flora.fauna at live.com
Subject: RE: Anna's Hummingbird
Date: Sun, 15 Feb 2009 20:51:55 -0800








Further to my first posting, have had an interesting note from Hal Opperman. In the same Natl Audubon Society article quoted in the P.I and on MSN, it was suggested that Anna's "aggression" is reducing the numbers of Rufous Hummingbirds present in their regular habitat. (Have NOT read full NAS paper). Certainly to my knowledge there is not a scrap of evidence that Rufous Hummingbirds are declining in their general numbers, certainly not from aggression from Anna's hummingbirds.The provisional results from the Magnolia feeder survey and Discovery Park study which I ran in the early 1980s suggested that inter-specific aggression between Anna's and Rufous varied by time of year and for different reasons at feeders, with dominance going back and forth.There was no observable aggression that suggested "aggression" as a limiting factor in the wild areas where they occur congruent to each other.What I have read in the literature suggests the same picture between Anna's and Allen's in the south of their range. Hummingbirds are simply opportunists, but there is certainly much to know. Dave Hutchinson
From: flora.fauna at live.com
To: tweeters at u.washington.edu
Subject: FW: Anna's Hummingbird
Date: Sun, 15 Feb 2009 16:00:11 -0800










From: flora.fauna at live.com
To: tweeters-request at mailman2.u.washington.edu
Subject: Anna's Hummingbird
Date: Sun, 15 Feb 2009 15:56:46 -0800








Thank you to the over 75 people who attended my Anna's Hummingbird lecture and discussion at the Nisqually Refuge. Contrary to the "one-size fits all" research paper from National Audubon published recently in the P.I. and on-line, Anna's Hummingbird is certainly not in the Pacific Northwest because of global warming.The reference for the pamphlet on Anna's that I would like you to read if you are still seeking further information is: Account #226 in the Birds of North America series, Anna's Hummingbird by Stephen Russell. 24 pages. This pulls together all basic research up to 1996. Thanks again, Dave Hutchinson

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