As an aside - there are these fields that have been created - note I only used the 2 English spellings for my search. As well, there can be fields created in any language and/or with just the behaviour written without “behaviour” in the description such as eating, mating, sleeping, preying.
https://www.inaturalist.org/observation_fields?utf8=✓&q=behavior&commit=Search
https://www.inaturalist.org/observation_fields?utf8=✓&q=behaviour&commit=Search
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