On the verge of extinction, mating prospects are bleak.

For species whose populations have plummeted, scientists have gone to great lengths to find animals a match. And to help low populations rebound, some scientists have devised unconventional methods.

"When a species is reduced to a population in single digits, the prospects for its continued survival are bleak but not zero," says Trond Larsen from Conservation International.

With the odds stacked against them, conservationists have been known to go the extra mile to keep a species from vanishing forever. The following are just a few examples.

Romeo is a Sehuencas frog in Bolivia. Earlier this week, scientists at Bolivia's Cochabamba Natural History Museum created a match.com profile for the frog.

Romeo isn't looking for