Endangered Schaus swallotail butterfly gets a boost in south Florida
After a worrying population decline, Schaus’ swallowtail butterflies can be found in just a few locations scattered from Biscayne Bay to Key Largo in south Florida. The species is now getting a boost from researchers and park protection, with yet another caterpillar release scheduled for September.
Releases like these have brought the Schaus swallowtail back from the brink of extinction. The project is a partnership between Florida State Parks, the U.S. Fish and Wildlife Service and the University of Florida.
The Schaus’ swallowtail, with its dark-brown wings, cream-yellow markings and dashes of red, nearly disappeared from the wild. The butterflies depend on the tropical hardwood hammock ecosystem that historically ranged from south Miami to lower Matecumbe Key. Much of the tropical hardwood hammocks originally found in the Florida Keys have been lost to development. Researchers say there were as few as four wild Schaus’ swallowtails in 2012.
Scientists took action to increase the butterflies’ chance of survival through captive rearing, larval releases and monitoring wild populations. In 2014, the University of Florida released 50 adult Schaus’ swallowtail butterflies and 200 caterpillars for the first time.
Volunteers survey the population from April to end of June, looking for the butterflies, either caterpillars, pupae or adult butterflies. Schaus’ swallowtail can remain pupae, or in their chrysalises, for anywhere from two months to two years.