Shy, and not so shy.
Two pearl cockatiels, natives of Australia, this week became the latest inhabitants of the Otago Museum's Tropical Forest.
The birds, with their striking crests, yellow head and orange spots, are already proving just as distinctive for their individual behaviours as for their appearance.
Museum living environments officer Anthony Stumbo said the birds had arrived on Monday, and were gradually settling in.
One cockateil was rather shy, preferring a perch high in some ducting at the top of the forest and keeping largely out of sight, before flying out in the afternoon and having something to drink.
The other bird was much more outgoing, sitting openly on a handrail high in the forest complex, and happy for human visitors to approach within a metre or so.
Dr Stumbo, who has a University of Otago PhD in zoology, said the appeal of acquiring the cockatiels, from a Dunedin pet shop, was not only their attractive appearance but their distinctive individual behaviour.
The latter point helped to open up the discussion about animal behaviour and communication during educational presentations at the forest, he said.
"Their behaviour was one of the reasons they were chosen, especially the way they convey emotion with the feathers on top of their heads.
"We're constantly just trying to make the feel of the place better for our visitors."
The cockatiels were about 30cm tall, and still growing.
The forest already has four other bird species: java finches, zebra finches and painted quail, followed more recently by Bengalese finches.
Many of the forest's visitors were making repeat trips, and the museum was always working to provide fresher and improved experiences, Dr Stumbo said.
The latest birds had not yet been given names, and would not be named until they had been in the forest for some time and had moulted, allowing their genders to be determined.
He had initially wondered how the cockatiels, which had earlier lived in cages, would respond to the much larger space in the forest.
"They're doing quite well."
