Relating to caliology, the study of bird nests and nesting behavior (now more commonly spelled ornithology).
From Greek 'kalos' (nest) and 'logos' (study), with the suffix '-ical' making it an adjective. This is an archaic or technical term in ornithological science.
Caliological is one of those gorgeous scientific words that's almost disappeared—it's specific, precise, and beautiful, but modern scientists just say 'nest behavior' instead, which is less charming.
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