Monarch overwintering numbers show encouraging continued increase in population size

The recent announcement of monarch overwintering numbers for the 2025-26 season shows a population increase for the second year in a row. This year, monarchs occupied 7.24 acres (2.93 hectares) at their overwintering sites in Mexico. These numbers, released by the World Wildlife Fund and Mexico’s National Commission of Protected Natural Areas, reflect a 64% increase from last year’s 4.42 acres (1.79 hectares)...

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