The number of Western monarch butterflies overwintering in California rebounded to more than 247,000 a year after fewer than 2,000 appeared, but the tally remained far below the millions that were seen in the 1980s, leaders of an annual count said Tuesday.
The Western Monarch Thanksgiving Count revealed the highest number of butterflies in five years but it is still less than 5% of the 1980s population, said Emma Pelton, senior endangered species biologist with the Xerces Society for Invertebrate Conservation.
