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Crimson Sunbird: Same or Two separate species? (1 Viewer)


Well-known member
I have just noticed the belly color of Crimson Sunbird are complete different. I am wondering if they are two different species or both same?

resize_Crimson Sunbird color.jpg

Both taken in Sarawak, Malaysian Borneo.

Left: Taken in Sept 2020.

Right: Taken in Oct 2020.

If same species, what reason for the belly color differences?


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