Morning Birding at Rock Bottom Ranch | September 15, 2015

ACES Staff

September 16, 2015

Morning Birding at Rock Bottom Ranch | September 15, 2015


Tuesday, September 15, 2015, 7:30AM – 10:30AM
Weather: rainy and overcast, clearing to partly sunny
Location: Rock Bottom Ranch

Species Identified            

Canada Goose
Great Blue Heron
Red-tailed Hawk
Rock Pigeon
Eurasian Collared-dove
Belted Kingfisher
Lewis’s Woodpecker
Northern Flicker


Peregrine Falcon
Black-billed Magpie
Black-capped Chickadee
Brown Creeper
House Wren
Blue-gray Gnatcatcher
American Robin
Gray Catbird
Orange-crowned Warbler


Green-tailed Towhee
Fox Sparrow
Song Sparrow
Lincoln’s Sparrow (pictured above)
White-crowned Sparrow
Dark-eyed Junco
Red-winged Blackbird
Brewer’s Blackbird
Brown-headed Cowbird

Other critters:  rock squirrel, least chipmunk, western tiger salamander



The steady rain early this morning was daunting, but it dwindled to a fine mist at RBR and eventually cleared to partly sunny through the morning. This weather shift brought out some nice bird activity in excellent light. Juveniles of many species were observed, including white-crowned sparrows whose crown stripes were in mid-change from buffy/brown to black/white. We had the chance to study an orange-crowned warbler, noting the dark eyeline, yellow undertail coverts, and pale gray streaks on the breast. We also observed Brewer’s blackbirds in a flock of males and females, with some females having the pale iris and others having the dark iris. We were able to compare Lincoln’s and Song sparrows, and observed the distinctive upward tail posture of the blue-gray gnatcatcher. The peregrine capped off the morning as we observed it perched for some time before it flew off. We can expect more excellent fall birding through early October meeting at Hallam Lake in Aspen- join us as we chase mixed flocks of great warblers, bushtits, and more!

~ Rebecca Weiss, ACES Bird Guide

Photo by Mark Fuller 

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