The Mangrove sunbird is unusual in several ways. First of all, the sexes are almost identical (which is very unusual when it comes to sunbirds). Then it is very inconspicuous; an alternative English name is "Mouse-brown sunbird". Furthermore, it builds a nest that really attracts attention. It seems to be constructed of cobwebs, various leaves, twigs, moss and odd objects. Here the female is feeding the half-grown nestlings with the insects she had in her bill.