Pigeons, doves and penguins secrete something analogous to milk. The discus fish also nurses its young.
As a human, you also carry eggs, just like every other animal on earth. Monotremes lay eggs, while certain sharks have an organ very like a placenta. Some snakes give birth to live young. Several lizard species do perfectly well in the absence of males to fertilize the females. Parthenogenesis has also been observed in every vertebrate group save mammals, and it's at least theoretically possible in them. And in a same sex environment, many fish and amphibians will spontaneously flip gender--you can test that yourself, by filling a fishtank with nothing but female guppies and leaving them for a few months.
The pitohui birds of New Guinea are deadly venemous, just like poison dart frogs from South America. Certain shrews are extremely venemous.
Bluefin tuna and some sharks maintain a very warm body temperature relative to their surroundings. On the other hand, naked mole rats, which ARE true mammals, live in hives like social insects and can't maintain a body temperature outside the nest--they're effectively cold-blooded.
Chrysopelea snakes can glide for long distances, and so can Draco lizards and Javan gliding frogs. Rats may be able to sense x-rays. Bats fly like birds and sense their surroundings by sonar. Many or most fish, including sharks, can sense electrical fields, and some catfish and eels can knock a man dead with a massive electrical shock. The platypus can also sense electrical fields with its bill to help locate food. Snakes can hunt prey by infrared. Insects and many, many animals can see ultraviolet light.
And plants can communicate information through chemical signatures, cooperate with one another or fight for resources, and even sacrifice their lives so that others of their species will live.
What "laws" does the platypus go against, again?
