Subject: [Tweeters] Purple Finch Date: Jul 3 17:10:38 2009 From: David Hutchinson - flora.fauna at live.com
Thanks for the response Michael. The BNA acct for PUFI mentions riparian as one of their preferred associations. There seems to be a fair amount of that at Marymoor, whereas almost zilch at Discovery. There is almost no cottonwood, the Oregon Ash is pretty scattered, and while we have both willow and alder, they are usually not together. I personally think their presence has something to do with forest maturation and amount of edge available.But I am interested to hear what other observer's experience is. I really brought the matter up, partly to test if my observations are correct.Also PUFI was one of the species mentioned in the National Audubon Society research article about global warming, suggesting that their populations are occurring year round further north. DH
-- David Hutchinson, Owner Flora & Fauna: Nature Books Discovery Gardens: Native Plants 3212 W.Government Way Seattle,WA.98199 http://www.ffbooks.net/ 206-623-4727
From: birdmarymoor at verizon.net To: flora.fauna at live.com Subject: Re: [Tweeters] Purple Finch Date: Fri, 3 Jul 2009 14:16:12 -0700
I don't know why Purple Finch wouldn't nest at Discovery. We've had enough detections at Marymoor throughout the summers (30-45% of visits each week throughout June-July) to suggest that they breed there. Almost all detections are of singing birds, so the drop-off in detections in early August may have more to do with the cessation of singing. Once the Oregon Ash seeds ripen in fall, we begin to see them regularly again.
In terms of habitat, at all season they seem to be associated with the Cottonwood/Oregon Ash forested areas. Occasionally, they're in Willow/Alder areas. We have essentially no maples at the park, so I can't say whether they avoid them. We almost never hear them in the conifers around the mansion.
As I write this, a Purple Finch is singing in my backyard...
== Michael Hobbs == Kirkland, WA == http://www.marymoor.org/birding.htm == http://www.marymoor.org/BirdBlog.htm == birdmarymoor at verizon.net
----- Original Message ----- From: David Hutchinson To: tweeters at u.washington.edu Sent: Friday, July 03, 2009 10:43 AM Subject: [Tweeters] Purple Finch
Discovery Park's Bird Checklist describes Purple Finch as Rare in summer and records the species as a non-breeder. Between late May and early July I have heard approx 5 singing male PUFI in the Park. While it might be easy to say:"oh, another case of global warming", one also might consider habit change. I always think of PNW PUFI as being birds of mature coniferous forests or "woodsy" outer suburbs of Greater Seattle. However it is likely that Discovery Park has also become more woodsy. Certainly the conifer forests are more mature and the amount of mixed forest with clearings has also increased due to the activity of park staff and many volunteers. Is anyone else noting PUFI breeding activity? DH -- David Hutchinson, Owner Flora & Fauna: Nature Books Discovery Gardens: Native Plants 3212 W.Government Way Seattle,WA.98199 http://www.ffbooks.net/ 206-623-4727
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