[cobirds] yellow-billed cuckoo

This afternoon around 2 pm there was a yellow-billed cuckoo at Confluence Ponds in Boulder, near planked pedestrian bridge. Slender bird with white spots on long tail.Brown back and crown contrasting with white belly and chin. Dark eyes. Down-curved bi-colored bill, dark upper mandible, yellow

[cobirds] Re: yellow-billed cuckoo

Maybe best bet is to park in the lot of Scott Carpenter Park on the w side of 30th St., just S of Arapahoe, and then walk along the creek to the ponds. You're bound to see birds along the creek path as well (last week's reports included plumbeous vireo, wilson's warbler, summer tanager, wester

[cobirds] Black-headed or rose-breasted grosbeak Boulder

This morning I saw what looked like a non-breeding female black-headed or rose-breasted grosbeak in our yard. Yellow under-wings, some streaking along sides but not on center of breast. Bill rather pale and not clearly bi-colored. Any help with more definitive ID would be much appreciated. Pi

[cobirds] stray birds

The recent sightings of the varied thrush and black-throated blue warbler behind the Base-Mar Center in Boulder raised a few questions for me. I am new to this list so my apologies if these questions are not appropriate for this forum. I am curious about research that has examined spatial

[cobirds] Re: stray birds

Thank you! Looks like a terrific resource. I'm also interested in further work that has examined or is examining changes observed in Atlas II in relation to factors such as urban development, natural resource exploitation, road building, pollution and other aspects of habitat destruction.

[cobirds] suggestions for books on migration

I would welcome suggestions for books on bird migration, including maps, not necessarily but preferably with information specific to Colorado. willem van vliet-- Boulder -- You received this message because you are subscribed to the Google Groups "Colorado Birds" group. To unsubscribe from th

[cobirds] Cinnamon teal, Boulder County

Yesterday afternoon, there were two cinnamon teal at Pella Crossing in the northern pond, east of 75th, mixed with redheads, common mergansers and ring-neckeds. Also present were common goldeneyes, two canvasbacks, a hooded merganser, two green-wingeds, a few mallards and gadwalls, and lots o

Re: [cobirds] House Sparrows - Boulder & metro area

In *The Moth Snowstorm: Nature and Joy, *Michael McCarthy writes eloquently about the near-extinction of house sparrows in London, England. He examines several explanations and adds the perspective of possibly more geographically restricted habitats for sparrows compared with other urban birds

Re: [cobirds] House Sparrows - Boulder & metro area

The book: *The moth snowstorm: nature and joy*. Michael McCarthy . Publ. by John Murray (2015). Willem van Vliet-- Boulder On Monday, April 9, 2018 at 4:21:36 PM UTC-6, Richard Trinkner wrote: > > Some personal House Sparrow data: > > Betw

[cobirds] Re: What CBC data can tell us about House Sparrows in Colorado Springs

Is it possible to disaggregate the data to see if the variations over time occurred across the board or were attributable to some places more than others? Willem van Vliet-- Boulder On Friday, April 13, 2018 at 12:52:32 PM UTC-6, doug...@gmail.com wrote: > > Hi all, > > First off, hi! I'm bran

[cobirds] African Collared-Dove?

Ted's eBird note on an African Collared Dove ( https://ebird.org/view/checklist/S45384479) made me go back to my photos of a dove I saw on April 28, just west of Greenlee Preserve. Perched near a bunch of Asian Collared doves, it looked about the same size, but was definitely much lighter over