by Phurpa Dorji, Tshering Nidup and Klein Wim.
by Gielis, Cornelis (Cee) Karma Wangdi.
by Thinley Gyeltshen Kalkman, Vincent & Albert Orr.
by Gittenberger, Edmund Pema Leda, Choki Gyeltshen, Sherub Sherub & Sangay Dema.
by Phuntsho Loday & Oscar Vorst [Cheten Dorji].
by Phurpa Dorji/Tshering Nidup and Klein Wim.
by National Biodiversity Centre.
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