I would say the precise ID of both Temincks/Great Cormorants is probably ignored by many birders in Japan (me included). The 2 look very similar and I have to say I rarely check any big Cormorants I see.
Up here is perhaps a bit different and south Hokkaido may be the nothern limit of Great in Japan. Temincks is very common on the coast here and Great only seems to breed in 2 locations in SW Hokkaido AFAIK: a lake and a river.
Up here is perhaps a bit different and south Hokkaido may be the nothern limit of Great in Japan. Temincks is very common on the coast here and Great only seems to breed in 2 locations in SW Hokkaido AFAIK: a lake and a river.
