○○○ oar ⪢⪢
Besides its streamline body, its most obvious adaptation into underwater life is a pair of
feathered rear legs that have evolved into oars and help it maneuver underwater.
http://qindex.info/i.php?x=15858
○○○ Potoo ⪢⪢
The Potoo bird is, without doubt, one of the strangest and most unique birds in the animal kingdom, that is, if you can spot them, their
feathers in general physique for that matter are incredibly well suited to camouflage themselves in the wild.
http://qindex.info/i.php?x=26409