[1] It lives among leaf litter on the tropical rainforest floor and was named after the Swift family who had provided funds for establishing the Kamiali Biological Station where the new species was found.

[3] The male frog makes a series of double clicks which the investigators had previously heard but had thought to be made by crickets.

Hearing this sound at close quarters while examining a millipede in the leaf litter, Michael Gründler turned his head and saw a minute frog rhythmically inflating its vocal sac.

Measuring just 8.5 millimetres (0.33 in), it might have been thought not to be fully grown except for the fact that calling is normally only done by mature male frogs as an advertisement to attract females.

It seems to be a fairly common species judging by the fact that calling males occur at separations of approximately 50 centimetres (20 in).