[cobirds] White-throated Sparrow & Ravens - Arapahoe

A White-throated Sparrow continues to visit (and then disappear from) my Centennial yard. This morning, the White-throated chased off Dark-eyed Juncos around the piles of seed I scattered. This is a reversal of the mid-winter dynamics. Then, the junco flocks were 2-3 times larger and the White-throated Sparrow skulked a bit more. 

Also in Centennial: Yesterday, I saw a Common Raven on the nest over the now abandoned Macy's at Streets of Southglenn in Centennial. From my vantage, I couldn't tell if the Raven was adding to or adjusting the nest -- or beginning any other sort of nesting activity in it.

Last year, I'm not sure that the nesting was successful, and I was left wondering if the removal of the Macy's signs (which are right below the nests) during the spring contributed. In previous years, there have been mixed results. One year, Rosanne Juergens found a dead Raven stuck in the building front below the nest. Other years, I've seen fairly large families of Ravens by summer. Let's hope for that!

Given that there's construction planned for Southglenn, including at the Macy's building -- but at some unknown date in the future -- it might be valuable for local birders to occasionally visit the Ravens to take stock, document activities (corvid and hominin alike), etc. I don't think there's anything imminent, thankfully, and I heard that the Sears building is the first to go. (There was a Say's Phoebe nest near the Sear's building last year.) 

Apropos of commercial nestings: One year, Brewer's Blackbirds nested at Southglenn. I haven't noticed them there regularly, though. They were divebombing passerby and, so, were hard to miss.

- Jared Del Rosso

Centennial, CO

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