Yumbo

From Wikitroid, the Metroid wiki

Yumbo
Official artwork of a Yumbo
Featured in	Metroid II: Return of Samus
Location	SR388

These fly side-to-side high overhead, so they rarely pose any sort of problem. They're very mosquito-like in appearance. The feathers along their long needle seem to rotate, giving the appearance of a chainsaw. Their rather small wings don't look as though they could support the weight of their entire bodies, but somehow they barely manage to.

[edit] Manual

"Flies unsteadily in the air."