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In this image taken from a Project Rattlecam video, an adult rattlesnake checks on juveniles after a bird flew near them at a den under remote observation in Colorado on Aug. 23, 2024. (Project Rattlecam via AP)
FILE - This undated image made from a video provided by Project RattleCam shows a "mega den" of rattlesnakes in a remote location in northern Colorado. (Project RattleCam via AP, File)
In this image taken from a Project Rattlecam video, an adult rattlesnake rests with juveniles at a den under remote observation in Colorado on Wednesday, Aug. 28, 2024. (Project Rattlecam via AP)
FILE - This image provided by Emily Taylor shows the weather station and camera setup, which are part of the Cal Poly research and community service initiative, Project RattleCam, in northern Colorado, in May 2024. (Emily Taylor/Project RattleCam via AP, File)
In this image taken from a Project Rattlecam video, an adult rattlesnake rests with juveniles at a den under remote observation in Colorado on Aug. 22, 2024. (Project Rattlecam via AP)
In this image taken from a Project Rattlecam video, an adult rattlesnake rests with juveniles at a den under remote observation in Colorado on Aug. 22, 2024. (Project Rattlecam via AP)