Nicobar Pigeon

Though Nicobar pigeons mostly eat fruits and seeds, they do live on islands and will sometimes pick up a seed on the beach. Though rare, occasionally, a grain of sand does get stuck under their tongue. That is where pigeon pearls come from.

Russian Red Tree Squirrel

This is a Russian red tree squirrel, which is white in the winter, living at the Red River Zoo in Fargo, which is white in the winter.

Bactrian Camel (Camelus bactrianus)

Many people get a new camel once the lips start falling off, but this is actually an easily solved problem and one that is much less likely to occur if the regular maintenance is performed.