Mostly Good News for Monarch Spring Migration
AUSTIN, Texas — Millions of monarch butterflies have begun their annual spring migration north into Texas, and entomologists say it’s mostly good news this year. All the monarchs in North America east of the Rocky Mountains winter in one mountainous region of central Mexico, where monarch numbers dropped alarmingly due to a severe snow storm in 2004. Scientists say monarch numbers in this region now appear to have bounced back to approximately 300 million butterflies.