This year Banham Zoo is celebrating its 50th year. The popular tourist attraction is known for its conservation work, here are 10 threatened species you can see during your visit.

Diss Mercury: An Amur tiger watching visitors at Banham Zoo. Picture: DENISE BRADLEYAn Amur tiger watching visitors at Banham Zoo. Picture: DENISE BRADLEY (Image: Archant)

• Amur (Siberian) tigers

The endangered species is the largest of all the big cats. It is believed there are only 250 adults in the wild.

• Grevy's zebras

Diss Mercury: Grevy's Zebra at Banham Zoo. Picture: DENISE BRADLEYGrevy's Zebra at Banham Zoo. Picture: DENISE BRADLEY (Image: Archant)

An endangered species, threats to the zebras include loss of habitat, hunting and diseases such as anthrax.

• Red Pandas

A close relative of the racoon, they are excellent climbers. It is though their population has decreased by 50pc in less than 20 years.

Diss Mercury: Red panda cub at Banham Zoo. Picture: Banham Zoo.Red panda cub at Banham Zoo. Picture: Banham Zoo. (Image: Archant)

• Snow leopards

These beautiful creatures are found in the high mountains of central Asia and the Himalayas and are a vulnerable species.

Diss Mercury: Snow Leopard patrols around the enclosure at Banham Zoo. Picture: Simon ParkerSnow Leopard patrols around the enclosure at Banham Zoo. Picture: Simon Parker (Image: Archant)

• Ring-tailed lemurs

A popular species at the zoo, they are threatened in the wild by deforestation due to charcoal production and burning for pasture.

Diss Mercury: Ring-tailed Lemurs. Picture: DENISE BRADLEYRing-tailed Lemurs. Picture: DENISE BRADLEY (Image: Archant)

MORE - Banham Zoo marks its 50th anniversary

• Snowy owl

Diss Mercury: The Snowy owl. Picture: Jerry DawsThe Snowy owl. Picture: Jerry Daws (Image: ©Archant Photographic 2010)

Found in the barren Arctic regions, it is a vulnerable species. It is thought climate change is affecting the availability of its prey.

• Giraffes

There is only one species of giraffe, but many subspecies. The wild population has dropped by 40pc in 30 years.

Diss Mercury: A baby giraffe at Banham Zoo. Picture: Sonya DuncanA baby giraffe at Banham Zoo. Picture: Sonya Duncan (Image: ARCHANT NORFOLK PHOTOGRAPHIC © 2009)

• Siamangs

The largest species of the gibbon family. Decreasing in the wild due to hunting and the destruction of their rainforest habitat.

Diss Mercury: A baby Siamang Gibbon baby with its mum at Banham Zoo. Picture: Denise BradleyA baby Siamang Gibbon baby with its mum at Banham Zoo. Picture: Denise Bradley (Image: ©Archant Photographic 2009)

• Red ruffed lemurs

They are facing extinction in the wild due to the destruction of their forest habitat for agriculture and timber.

• Sri Lankan leopards

Diss Mercury: A red ruffed Lemur. Picture: DENISE BRADLEYA red ruffed Lemur. Picture: DENISE BRADLEY (Image: Archant)

Native to the island of Sri Lanka, they are found in a range of habitats. The estimated population is just 800.

Diss Mercury: Sri Lankan leopard roams its enclosure at Banham Zoo. Picture: Sonya DuncanSri Lankan leopard roams its enclosure at Banham Zoo. Picture: Sonya Duncan (Image: ARCHANT EASTERN DAILY PRESS (01603) 772434)