Overwintering monarch butterflies rely on a temperature-sensitive internal timer to wake them up to make the trip back north, researchers report. Source: https://earthsky.org/earth/monarch-butterflies-heat-sensitive-timer-migration…
Tag: monarch migration
300 Million Butterflies Will Fly Through Texas This Spring
An estimated 300 million monarch butterflies are expected to fly through Texas this spring, an increase of 144 percent from last year. Monarch butterflies migrate southward in the autumn, from the central United States toward Florida and Mexico, and back up north in the spring. Over the last 20 years, populations of monarch butterflies across… Continue reading 300 Million Butterflies Will Fly Through Texas This Spring