From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Zookeepers install bamboo-like poles in the siamang enlosure — will the siamang family interact with their new toys?

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Mireya teams up with the Chicken Busters to catch some of Miami’s most notorious wildlife - roosters.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

This gigantic polar bear is still no match for the swooping attacks of arctic terns.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

A white tiger is pregnant and Bud and Carrie must protect her and the other animals at the zoo from a heavy snowfall.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

This mastiff loves to play in the park so much that he takes other dog’s toys back home with him — in his stomach.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

One poor lion’s days are numbered after a serious run-in with a large hippo.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

In the Houston Zoo, transferring fish from tank to tank is a lot more complicated than you’d think!

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Video Blog: Go behind the scenes with the Nasca Lines production crew.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Never Before Seen Footage: Looting of tomb sites causes problems for archaeologists.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Ed and his crew team up to move the biggest and meanest croc in the swamp.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

In gelada clans, every male wants to be an alpha male — but there can be only one.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Cameraman Andy Cassagrande joins a fisherman on the Gulf to see the oil spill damage underwater firsthand.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Sneak-attack! A lion hunts down a zebra, then fights for position at the carcass among his gigantic 22-member superpride.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

America’s capital is under assault - from the brown rat.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Brutus celebrates his 8th birthday with carrot cake, gifts, and a salmon piñata.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

The rat — the city-dwelling mammal we love to hate.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Two male dolphins keep tabs on their female 'round the clock - in order to keep her from mating with the competition.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

As one tiny seal pup escapes a shark’s hungry jaws, another is swept into the ocean and quickly eaten by a great white.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Ed does his morning chicken check and finds a surprise in his coop.

From: National Geographic Channel on Sat, May 07 2011 6:56 PM

Zamir is trying to get in with Fang’s troop so they can help him overthrow the Galta Gang's leader.