Monarch Butterflies, The GBBC
There’s good news from the mountains of central Mexico this winter. World Wildlife Fund Mexico and the Monarch Butterfly Biosphere Reserve announced on Jan. 30 that 14 overwintering monarch colonies occupied a total area of 14.9 acres, up from 6.1 acres last winter. Counts of individual butterflies are impossible because they are so small and many roost high in the oyamel fir trees. Instead areas occupied by the butterflies are measured. These are the best results since 2006-07 when monarchs occupied 17 acres of mountain forest. The low point over the last 25 years came in ...