Invasive red swamp crayfish found in two locations in Michigan
The Michigan Department of Natural Resources recently confirmed the presence of invasive red swamp crayfish (Procambarus clarkii) in Sunset Lake in Vicksburg, south of Kalamazoo (Kalamazoo County), and in a retention pond off Haggerty Road in Novi (Oakland County).
Reports of the crayfish at Sunset Lake came to the DNR from two separate landowners Thursday, July 13. DNR staff verified the reports during a survey of the area July 14, finding several crayfish in the grass in a local park and in shallow areas on the lake’s west side.
A citizen reported possible red swamp crayfish in the Novi retention pond Monday, July 17, after a child captured one in a dip net. DNR staff responded that afternoon and removed 111 specimens from the pond.
These two reports represent the first live detections of red swamp crayfish in Michigan. In 2015, discovery of a pile of dead red swamp crayfish at Kollen Park in Holland (Allegan County) led to an intensive trapping effort by the DNR in Lake Macatawa and portions of the Grand River. No live crayfish were found at that time.
What are red swamp crayfish? Read more