Biofluorescence in the platypus (Ornithorhynchus anatinus)

The occurrence of biofluorescence across Mammalia is an area of active study. We examined three specimens of the platypus (Ornithorhynchus anatinus) from Tasmania and New South Wales, Australia, housed in the Field Museum of Natural History (Chicago, Illinois, USA) and the University of Nebraska State Museum (Lincoln, Nebraska, USA) under visible light and ultraviolet (UV) light. The pelage of the animals appeared uniformly brown under visible light and green or cyan under UV light, due to fluoresced wavelengths that peaked around 500 nm. Our observations are the first report of biofluorescence in a monotreme mammal.

Automated summary

The researchers observed several platypus specimens and found that they exhibited green or cyan fluorescence under ultraviolet light. This is the first report of biofluorescence in a monotreme mammal.