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These cute pictures show a marmoset just monkeying around with an unlikely friend - an iguana.

The female white-fronted marmoset can be seen giving the green iguana, who is almost bigger than her, loving pecks and even a little friendly nibble.

At one point, the curious monkey also appears to be giving her mate a little massage, just like she would with another primate.

(Image: Caters)

(Image: Caters)

These incredible pictures were taken by Conny Schmidt, from Dusseldorf in Germany.

The 58-year-old had heard about their friendship previously, as the duo are well known in the area, and decided to go to Krefeld Zoo, Germany to get some snaps.

She said: “They were both allowed to roam free in the cage, which was the tropical house part of the zoo.

(Image: Caters) (Image: Caters)

“They seemed to really trust each other. The marmoset was very intrigued, touching the iguana.

“I had heard about them and their relationship as it is well known in the area, so these weren't just lucky pictures.”