MEXICO CITY (AP) — Monarch butterflies have begun entering Mexico on their annual migration from the United States and Canada.READ MORE: Fight Between Brothers Ends With 1 Shot, Critically Injured And 1 Arrested In Alvarado Friday Night
Mexico’s Environment Department said Friday that the orange-and-black butterflies were spotted by park rangers entering Coahuila state, on the border with Texas.
The butterflies head for the fir and pine forest of central Mexico, where they spend the winter. No butterfly lives to make the full round trip, and it is unclear how they find the route each year.READ MORE: 'I'm Afraid We're Going To See A Surge Of Violence' Says Texas Criminologist Following Recent Mass Shootings
Last year, butterflies that reached the wintering grounds covered 2.79 acres (1.13 hectares). That was a 69 percent rebound from the previous February’s 1.65 acres (0.67 hectare), which was the lowest since record-keeping began in 1993.
The migratory route can be 3,400 miles (5,470 kilometers) long.MORE NEWS: Texas Grand Jury To Consider Charges In Shooting Death Of Protester Garrett Foster Last Summer
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