In 2017, a group of scientists raised alarm bells by showing that flying insects had declined in Germany by more than 70% in the three preceding decades. Studies before and since then have shown similar patterns in insects on a global scale. But with 1 million known species—and conservative estimates indicating there are millions more awaiting discovery—there aren’t nearly enough entomologists to document the full scale of insect diversity, much less how their populations change over time.
Click here for original story, Park rangers use butterflies to take planet’s pulse in a biodiversity hotspot
Source: Phys.org