Rhinos

Official estimates suggest that there are fewer than 80 of these rhinos left in the wild.

Air can be suctioned out of shipping containers for dogs to sniff.

The Kenyan official made the statement during Sudan's, the world's last male northern white rhino, funeral on Saturday.

Johannesburg breeder John Hume says that making rhino horn more easily available will deter poachers from killing the rare animals.

The largest study of Javan rhinos suggests these beasts are hovering on the edge of extinction.

An international ban on trading rhino horn remains in place.

Thailand is a key hub for the illegal ivory trade.

But experts worry legal schemes can't overcome poaching and illegal profits.

There are only 5,000 black rhinos left in the wild.

It doesn't exactly match historical description of unicorns, however.

The Hong Kong government is to impose heavy penalties on smuggling and illegal trading of endangered species.

The Cincinnati Zoo is just awaiting final approval from U.S. Fish and Wildlife.

The survival of the species is in doubt as zoos and conservationists monitor the population.

Rhinos were declared extinct in Zambia in 1998, ravaged by poachers. Today they are back and living in the wild once again.

"The worst time of all for me is when everything slows and you have time to think," says Rory Young, anti-poaching specialist.