Orphaned tree kangaroo raised by surrogate wallaby mother in Adelaide zoo

World-first surrogacy between a wallaby and a kangaroo occurred after the tree kangaroo's mother was killed by a falling branch

An orphaned tree kangaroo has been raised by a surrogate wallaby mother at Adelaide zoo, in what vets say is a world first.

The cross-species surrogacy between a wallaby and a kangaroo has never been attempted before but was forced on the zoo when the the tree kangaroo's mother was killed by a falling branch.