In this Tuesday, June 18, 2013 photo Zita, a liger, half-lioness, half-tiger, carries her one month old liliger cub in the Novosibirsk Zoo. The cub's father is a lion, Sam. (Photo by Ilnar Salakhiev/AP Photo)

In this Tuesday, June18, 2013 photo Zita, a liger, half-lioness, half-tiger, licks her one month old liliger cub in the Novosibirsk Zoo. (Photo by Ilnar Salakhiev/AP Photo)

In this Tuesday, June18, 2013 photo a lion Sam walks in Novosibirsk Zoo. Zita, a liger, half-lioness, half-tiger, and the lion, Sam are a pair, which gave birth to liliger cubs. (Photo by Ilnar Salakhiev/AP Photo)

In this Tuesday, June 18, 2013 photo Zita, a liger, half-lioness, half-tiger stands with her one month old liliger cub in the Novosibirsk Zoo. (Photo by Ilnar Salakhiev/AP Photo)

In this Tuesday, June 18, 2013 photo Zita, a liger, half-lioness, half-tiger, licks her one month old liliger cub in the Novosibirsk Zoo. (Photo by Ilnar Salakhiev/AP Photo)

In this Tuesday, June 18, 2013 photo, a month-old liliger cubs walk in Novosibirsk Zoo. The cubs' mother is Zita, a liger – half-lioness, half-tiger, and their father is a lion, Sam. (Photo by Ilnar Salakhiev/AP Photo)

In this Tuesday, June 18, 2013 photo Zita, a liger – half-lioness, half-tiger – watches her one month old liliger cub in the Novosibirsk Zoo. (Photo by Ilnar Salakhiev/AP Photo)

In this Tuesday, June 18, 2013 photo, Zita, a liger – half-lioness, half-tiger – carries her one month-old liliger cub in the Novosibirsk Zoo. (Photo by Ilnar Salakhiev/AP Photo)

In this Tuesday, June18, 2013 photo, a month-old liliger cub walks in Novosibirsk Zoo. The cub's mother is Zita, a liger – half-lioness, half-tiger, and father is a lion, Sam. (Photo by Ilnar Salakhiev/AP Photo)