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A male Tree Swallow performs female-like behavior during incubation.

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Published on Mar 9, 2016

When they relieve females during the incubation period male tree swallows usually just enter a box, check things, then watch back out from the entrance hole. However, males sometimes perform surprisingly female-like behaviors, as this video shows.

Video from Francois Paquette of QC. Editing by Chris Gates of NY.

For more on tree swallow incubation see: http://treeswallowprojects.com/cincub...

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