As with most birds, sunbird also show sexual dimorphic. Male sunbird usually have a very bright & colourful plumage and female usually duller as compare. Is really difficult to identify female sunbird on the field if they are not with the male sunbird. They looks very similar to Olive-backed sunbird & about the same size too!
Male Crimson Sunbird (Aethopyga siparaja) with very beautiful plumage.
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