Insect Decline

This undated photo provided by Michael Thomas in April 2020 shows a clouded sulphur butterfly in Cromwell, Conn. In an April 2020 interview, Ann Swengel, a citizen scientist tracking butterflies for more than 30 years, recalled that a few decades ago she would drive around Wisconsin “look out in a field and you’d see all these Sulphur butterflies around. I can’t think of the last time that I’ve seen that.” (Mike Thomas via AP)