The "Python Challenge" is on

MIAMI (AP) - Florida wildlife officials say 21 Burmese pythons have been killed so far in a public hunt for the invasive species in the Everglades.

It's unknown how many pythons live in the Everglades. Even experienced hunters have a hard time spotting the snakes in the swamplands.

The Florida Fish and Wildlife Conservation Commission says more than 1,000 people registered for the state's monthlong "Python Challenge." The hunters may find more success if colder temperatures drive the snakes onto sunny surfaces.

The snakes killed since the contest began Saturday will be processed by the University of Florida. The state hopes to apply the data gleaned from the carcasses to management plans for the Everglades.

Officials say the large snakes are devouring native wildlife at an alarming rate.