Underparts definitions

Underparts

Under surface of a bird from throat to vent
Found on https://birds.iitk.ac.in/glossary?page=238

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Underparts

Under surface of body from throat to under tail coverts.
Found on https://www.encyclo.co.uk/local/22222

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underparts

The underneath (ventral) side of a mammal (not the back or sides), as of a woods mouse with white underparts.
Found on https://www.utep.edu/leb/keys/glossary.htm

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