Nest building behavior ?? - Am. Dippers on Clear Creek at Lowell Blvd, Adams County

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Steve Smith

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Mar 15, 2020, 7:47:10 PM3/15/20

to Colorado Birds

This morning, Kathryn and I observed the 2 dippers on Clear Creek under the Lowell bridge carrying twigs, and on 3 occasions watched one enter/exit a hole in a concrete retaining wall by the dam. The wall is north facing on the south side of the creek immediately downstream of the dam. The wall has 3 holes each about 4 inches square. The Dippers were using the center hole just west of the graffiti.

Steve Smith

Denver

Robert Canter

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Mar 15, 2020, 9:57:00 PM3/15/20

to Colorado Birds

Hi Steve

Great. That sounds like the hole used in 2012. The nest was first observed March 6, 2012 and young were seen April 28, 2012.