[Note: undated footage]

This is one of the adorable offspring of endangered rainforest chameleons rescued from animal traffickers in Austria.
The youngster is one of four who were born after their mother was found being smuggled through Vienna Airport.

Now heartwarming footage from the city's Schoenbrunn Zoo has emerged showing one of the babies as it takes its early steps out of its tiny vivarium.

The youngster is seen cautiously clambering over the index finger of a reptile housekeeper.

Smaller than their thumb, the hatchling bobs up and down swivelling its eyes in different ways, a skill that will later come in handy for hunting down insects to eat.

But at the moment it seems more interested in the huge world around it and completely ignores a juicy fly as it lands on the keeper's finger.
After a minute, she places the baby back in its enclosure marked 'Achtung Jungtier', or 'Danger Young Animals'.

The footage continues showing keepers spraying vivariums with a water mister, trying to replicate the forest environment of the lizard's native habitat in Tanzania.
Keepers identified the youngsters as Usambara two-horned chameleon (Kinyongia vosseleri), also known as the Vosseler's blade-horned chameleon.

The species is listed as endangered on the International Union for Conservation of Nature's (IUCN's) Red List of Threatened Species.