A Science of Signs of Spring

primack-thoreau1Wall Street Journal (subscription required)
Richard Primack, College of Arts & Sciences

To chart the advent of spring, thousands of volunteer naturalists are logging when cherry trees and lilacs first blossom, when Monarch butterflies and hummingbirds fly north, when insects stir and robins nest…

Expert quote:

“We are starting to see dramatic effects across the country and the National Phenology Network is helping to document that.”

View full article