The Monarch Butterfly

USFWS, Rick L. Hansen

Texas is an important state in monarch migration because it is situated between the principal breeding grounds in the north and the overwintering areas in Mexico. Monarchs funnel through Texas both in the fall and the spring. During the fall, monarchs use two principal flyways. One traverses Texas in a 300-mile wide path stretching from Wichita Falls to Eagle Pass. Monarchs enter the Texas portion of this flyway during the last days of September. By the third week of October, most have passed through into Mexico. The second flyway is situated along the Texas coast and lasts roughly from the third week of October to the middle of November.

National Partners & Resources

U.S. Fish and Wildlife Service Region: Southwest Region National Wildlife Federation Monarch Watch Monarch Joint Venture Journey North Monarch Larva Monitoring Project Report Milkweed in Texas