Baleen Whales have two blowholes
Toothed whales like porpoises and dolphins like this Orca have only a single blowhole
Sea Otter
Red-necked Phalaropes
Rhinoceros Auklet
This auklet is actually a puffin and is the only living species in its genus.
Fork-tailed Storm-Petrel
They store oil in their stomach. They regurgitate the oil onto predators, and sometimes on each other during squabbles over nest sites.
One other use for this oil is to feed their chicks.
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