O.—Oriental (Indian) Region (India to Wallace's Line).
P.—Palaearctic Region (Europe, N.W. Africa, and Northern and Western Asia, except Arabia).
E.—Ethiopian Region (Arabia and Africa, except N.W.).
Nc.—Nearctic Region. ("The A.O.U. Check-List of North American Birds, 1910" has been followed in making this North America, less Mexico).
Nl.—Neotropical Region (South America, with Mexico).
A.O.U.—American Ornithologists' Union; R.A.O.U—Royal Australasian Ornithologists' Union.
A. denotes found throughout Australia; E.A. denotes found in Queensland, N.S.W., and Victoria; S.A. denotes South Australia; C.A. denotes Central Australia; W.A. denotes Western Australia; N. Ter.—Northern Territory; Mal.—Malaysia; Mol.—Molucca Is.; N. Cal.—New Caledonia; N. Heb.—New Hebrides; N.G.—New Guinea; N.Z.—New Zealand; Br.—British; T.—Tasmania.
Nom.—Nomadic; Mig.—Migratory; Part. Mig.—Partly Migratory; Stat.—Stationary; exc.—except; acc.—accidental.
C.—common; v.c.—very common; r.—rare; v.r.—very rare; u.—unlikely that the ordinary observer will see it.