There were a number of different animals — the Vivarium — in Linnaeus’ botanical garden including guinea pigs, peacocks, parrots, hedgehogs and various species of monkey. A great favourite of Linnaeus was a tame raccoon, which entertained children and visitors with its pranks.
The small, grey huts on tall poles are monkey houses. When it was warm enough, Linnaeus’ monkeys would be allowed outside. They were chained to the metal railing which runs vertically along the pole and could thus climb up and down between the hut and the ground below.