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One genus of this family looks distinctly different
While most of the species in these different genera have very similar characteristics, one stands out as being distinctly different. This genus is the “Arachnothera,” birds referred to as “spiderhunters.” While most other sunbirds are very colorful (at least the males), both sexes of spiderhunters tend to have a dull brown plumage.
They are also much larger than some other species of sunbirds. Another difference is that spiderhunters build completely different nests than all the other species. Their nests are also extremely well hidden as opposed to other sunbirds that build it right in plain sight.