Monarch butterfly forests Forests of Mexico

monarch butterflies clustering on trunks , branches of oyamels.

the monarch butterfly biosphere reserve contains over-wintering habitats of eastern population of monarch butterfly. reserve located in trans-mexican volcanic belt pine-oak forests ecoregion on border of michoacán , mexico state. millions of butterflies arrive in preserve annually. butterflies inhabit fraction of 56,000 hectares of reserve october–march. biosphere s mission not protect butterfly species, habitat well. composition of forest varies altitude:

oak species 2900 metres above sea level
oak , pines between 1500 , 3000 masl
oyamel fir between 2400 , 3600 masl.