Monarch Butterfly Count Nears 30-Year Low
レベル B1 · As It Is
A nonprofit group says the number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in nearly 30…
レベル B1 · As It Is
A nonprofit group says the number of monarch butterflies spending the winter in the western United States has dropped to its second-lowest mark in nearly 30…