This Scrub Jay lost its tail feathers, probably to some predator that had a near miss. Can a bird fly with no tail feathers?

If a mule is a cross between a male donkey and a female horse, what do you call a cross between a female donkey and a male horse?

My Black Widow Spider's egg case hatched, releasing hundreds of tiny babies. While prey animals tend to have lots of offspring, most predators tend to have relatively few offspring. Why do spiders have so many babies?

Another egg case from my Black Widow spider just hatched. Notice that the babies are brown and white, instead of the characteristic shiny black with red markings. Why?

Are these single celled organisms plants or animals?