File:0328 blue heron rookery munsel ODFW (4421085878).jpg

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-Photo by Kathy Munsel, Oregon Department of Fish and Wildlife-

The Blue Heron Rookery

Great Blue Heron (Ardea herodias) gather in colonies in January to mid-March. Males choose the nest sites and court females. Pair formation and nest building begin in min February and eggs are laid from late February through April. Both sexes incubate and feed the young. Clutch size is usually 2-6 eggs. Incubation takes 28 days and eggs hatch from early April until the end of May. At least one adult is present at the nest almost continuously until 3-4 weeks after eggs hatch. By week 7 adults return to nests only to feed chicks. Young fledge from early June through mid-August, typically at 7-8 weeks of age.
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Source 0328_blue_heron_rookery_munsel_ODFW
Author Oregon Department of Fish & Wildlife

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This image was originally posted to Flickr by Oregon Department of Fish & Wildlife at https://flickr.com/photos/39743308@N07/4421085878. It was reviewed on 4 October 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the Public Domain Mark.

4 October 2021

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current09:09, 4 October 2021Thumbnail for version as of 09:09, 4 October 20212,100 × 1,500 (1,008 KB)Ltn12345 (talk | contribs)Transferred from Flickr via #flickr2commons

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