Large flock of Common Nighthawks, Lyons, Boulder County
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Rolf Hertenstein, Lyons
Jul 16, 2018, 11:45:17 PM7/16/18
to Colorado Birds
At 735p this evening I heard nighthawks from our yard. A flock of about 45 was circling n a late thermal. After slowly climbing and drifting, the entire flock departed, not in anything even vaguely resembling a formation, towards the west-northwest until I lost sight of them.
Rolf Hertenstein, Lyons, Boulder County
Rolf Hertenstein, Lyons, Boulder County
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