When the crocodile yawns, the trochilus flies into his mouth and cleans his teeth. The trochilus gets his food thereby, and the crocodile gets ease and comfort; it makes no attempt to injure its little friend, but, when it wants it to go, it shakes its neck in warning, lest it should accidentally bite the bird.
Matt The woodpecker …pecks at the bark of trees to drive out from under it maggots and gnats; when they emerge, it licks them up with its tongue, which is large and flat. It can run up and down a tree in any way, even with the head downwards, like the gecko-lizard. For secure hold upon a tree, its claws are better adapted than those of the daw; it makes its way by sticking these claws into the bark.
Pre-Renaissance Images Bestiaries Pliny the ElderPliny the Elder (Natural History, Book 10, 86): “The salamander is a shaped like a lizard, but is covered with spots.lizard A salamander is so cold that it puts out fire on contact. It vomits from its mouth a milky liquid; if this liquid touches any part of the human body it causes all the hair to fall off, and the skin to change color and break out in a rash. Salamanders only appear when it rains and disappear in fine weather.” http://bestiary.ca/beasts/beast276.htm
The whale remains floating at the surface for long periods and sailors, thinking the whale to be an island, land there and build a fire to cook their food. After a time the heat penetrates the whale's thick skin, and it dives to cool itself. The ship is dragged down with it and the sailors drown. When the whale is hungry it opens its mouth and emits a sweet odor, which attracts small fish. The fish swim into the whale's mouth, which closes on them. Allegory/Moral The whale who deceives sailors and drags them down to their deaths signifies the devil, who deceives those he drags down to hell. Those of weak faith who give in to the sweet odor of worldly desires will be swallowed up by the devil.