Earthworm invasion

Beavers reshape landscapes with their dams. Wolves control elk populations. Sea otters protect kelp forests by eating sea urchins. These are what ecologists call "keystone" species: critters that control an ecosystem and ...

Florida bill would ban pythons as pets

You wouldn't be able to buy a Burmese python as a pet anymore in Florida, under a bill drafted by a state senator who said the state should shut off the source of "dangerous reptiles" that have colonized the Everglades.

Fire ant colonies seem to be down dramatically

The red imported fire ant, one of the most horrifying of the foreign species that have established themselves in the United States, appears to be in retreat.

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