Nile monitor lizards, an invasive and dangerous species, are spreading across Florida. Here's where they are and what to do ...

Wildlife biologists and trappers in Florida say Nile monitors are an up-and-coming invasive species that threatens native wildlife.

Powerful, carnivorous Nile monitor lizards are expanding through South Florida's canal systems, with sightings climbing sharply, according to wildlife officials.

Florida residents are no strangers to invasive reptiles. But this 6-foot-long African lizard poses an especially big threat.