Decline in the eastern migratory monarch butterfly population

Decline in the eastern migratory monarch butterfly population as surveyed by the World Wildlife Fund-Mexico

Detailed Description

Decline in the eastern migratory monarch butterfly population as surveyed by the World Wildlife Fund-Mexico.
Populations in the high-elevation Oyamel fir forests where eastern monarchs overwinter are indexed by the area over which they occur.
Semmens et al. (2016) provided an adjusted measurement of population size which corrects for observation error.

Details

Image Dimensions: 800 x 478

Date Taken:

Location Taken: US