Morning Birding Species List | July 31, 2018

ACES Staff

August 1, 2018

Morning Birding Species List | July 31, 2018

Tuesday, July 31, 2018, 7:00AM – 10:00AM
Weather: Sunny
Location: Hallam Lake and Aspen Community Garden

Species Identified

Black-chinned Hummingbird
Broad-tailed Hummingbird
Great Blue Heron
Sharp-shinned Hawk
Belted Kingfisher
Cordilleran Flycatcher
Steller’s Jay
Black-billed Magpie
American Crow
Violet-green Swallow
Black-capped Chickadee
Mountain Chickadee
White-breasted Nuthatch
House Wren
Ruby-crowned Kinglet
American Robin
Cedar Waxwing
House Finch
Pine Siskin
Green-tailed Towhee
Vesper Sparrow
Lark Sparrow
Song Sparrow
Red-winged Blackbird
Yellow Warbler


An abundance of birds today is evidence of the pulse of fledglings joining adult birds on the wing this season. Adult birds were building nests (waxwings), carrying food (robins), and feeding fledglings (song sparrow, robin, pine siskin). A highlight at Hallam Lake was observing a mass exodus of 50+ Violet-green Swallows followed by the swift flight of a Sharp-shinned Hawk that was being chased by an American Crow. Another highlight this morning was the sparrow study at the Community Garden, where small flocks of Lark Sparrows and what appeared to be Vesper Sparrows were resting and feeding in shrubs just outside the garden fence. Juvenile Green-tailed Towhees patrolled the garden rows on the ground, while Song Sparrows darted between the shrubs and ground. We also had great looks at male and female Black-chinned and Broad-tailed Hummingbirds. We compared wing trilling between the two species as well as tail patterns between males and females.  

Today’s mini-lesson focused on the breeding biology of Sharp-shinned Hawks, based on a stellar photo of an active nest photographed by an ACES Naturalist/Educator near Independence Pass. We also looked at Birds of North America, and online resource by Cornell Lat of Ornithology that Pitkin County Library subscribes to…  go to this link, then under ‘Library Collection’ select ‘Research,’ then ‘Research A-Z,’ then select ‘B,’ then under Birds of North America, select ‘Access outside of the library.’ Then you will be prompted to enter your library card #. Next, you will be in Birds of North America, where you can type in the common name of any bird and find current, in-depth, discussions for any North American species, citing scientific literature and studies.

Join us next Tuesday at 7:30am at Hallam Lake for more exciting summer birding!

~ Rebecca Weiss, ACES Bird Guide 

Photo by Ben Seipel

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