Scientists say the number of Monarch butterflies wintering in Mexico is now at the lowest level ever since records began in 1993. In their recorded peak in 1995, the butterflies covered more than 44.5 acres of fir and pine...
Scientists say the number of Monarch butterflies wintering in Mexico is now at the lowest level ever since records began in 1993. In their recorded peak in 1995, the butterflies covered more than 44.5 acres of fir and pine...