Fluorescent Pink Flying Squirrel Discovered
The North American flying squirrel fluoresces pink at night under ultraviolet light, but the purpose of the pink color is still a mystery to researchers.
Allison Kohler, a graduate student in the Texas A&M University wildlife and fisheries department in College Station, helped make this discovery as well as affirm other flying squirrels do in fact fluoresce pink. More information can be found at http://bit.ly/FlyingPinkSquirrels.
Kohler’s undergraduate professor Dr. Jon Martin, associate professor of forestry at Northland College in Wisconsin, was doing an exploratory forest survey with an ultraviolet flashlight in his backyard. Initially, he was looking at different lichens, mosses and plants to see what fluoresced. By chance, a flying squirrel happened to be at his bird feeder. When he saw it under the ultraviolet light, it was hot pink.
Photographs of a flying squirrel under visible light and ultraviolet light shows what the specimen looks like to the human eye and with the aid of a UV light to fluoresce pink
With access to a museum collection at the Minnesota Science Museum, Martin asked Kohler to take the lead on the project and develop a protocol to help further investigate exactly what it was they had found.
“I looked at a ton of different specimens that they had there,” Kohler said. “They were stuffed flying squirrels that they had collected over time, and every single one that I saw fluoresced hot pink in some intensity or another.”
Photo courtesy of Allison Kohler
In order to expand the search, the team went to the Field Museum of Natural History in Chicago and gathered more specimens. In all, they researched over 100 specimens ranging across numerous states, all confirming their “pink theory.” They also looked at five additional live specimens.
“We tested all three of the North American flying squirrel species: the Northern flying squirrel, the Southern flying squirrel and the Humboldt’s flying squirrel, and all three of them fluoresced,” she said.
After comparing the flying species to other squirrels, like the American red squirrel and gray squirrel, the team found that the pink color is unique to the flying squirrel.
The reasons for the squirrels to fluoresce pink is still under investigation, but communication and camouflage are two top contenders for why this might be happening, the team has hypothesized.
“They could be communicating with members of their own species by showing off their fluorescence to each other, or it might be a sort of mating display,” Kohler said. “The other hypothesis is that they could be using this fluorescence as an anti-predator trait to communicate with other species, avoiding predation by other species by blending in or dealing with their potentially ultraviolet-saturated environments.”
As the research develops, she said, the importance of this find will present itself more clearly. Kohler plans to continue her research while pursuing her master’s degree at Texas A&M. Further research will look firmly at the implications of the team’s find.
“It could potentially help with the conservation of the species or other species, and it could also relate to wildlife management,” Kohler said. “The more that we know about the species, the more we can understand it and help it. This is opening a new door to the realm of nocturnal-crepuscular, or active during twilight, communication in animals.”
Contacts and sources:
Laura Muntean
Citation:
Source: http://www.ineffableisland.com/2019/02/fluorescent-pink-flying-squirrel.html
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