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Notes on Individual and Sexual Bill Variation in the British Tree‐creeper (Certhia familiaris Britannica Ridgway)
Author(s) -
Clancey P. A.
Publication year - 1943
Publication title -
ibis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.933
H-Index - 80
eISSN - 1474-919X
pISSN - 0019-1019
DOI - 10.1111/j.1474-919x.1943.tb03994.x
Subject(s) - character (mathematics) , variation (astronomy) , genealogy , family tree , tree (set theory) , biology , history , demography , zoology , geography , sociology , mathematics , mathematical analysis , physics , astrophysics , geometry
T he purpose of this short treatise on the bills of Certhia familiaris Britannica Ridgway is to point out an as yet unrecognized sexual character in the species.