when do the monarch butterflies return to mexico
Monarch butterfly migration Starting in September and October, eastern and northeastern populations migrate from southern Canada and the United States to overwintering sites in central Mexico where they arrive around November. They start the return trip in March, arriving around July. No individual butterfly completes the entire round trip; female monarchs lay eggs for the next generation during the northward migration[2] and at least four generations are involved in the annual cycle.
Karner blue The Karner blue (Plebejus melissa samuelis) is an endangered subspecies of small blue butterfly which was once found in significant numbers in the Miller section of Gary, Indiana community of the Indiana Dunes National Park. The butterfly is now mainly found in other parts of the Great Lakes states, such as Wisconsin and Michigan, in small areas of New Jersey, and also in southern New Hampshire, and the Capital District region of New York. The butterfly, whose life cycle depends on the wild blue lupine flower (Lupinus perennis), was classified as an endangered species in 1992. In May 2000, the Canadian Species at Risk Act listed the Karner blue as being locally extinct in Canada.[1] This subspecies of Plebejus melissa was described by novelist Vladimir Nabokov.[2]