Question

How did the pesticide DDT threatened the population of the brown pelican?

Answer 1

The brown pelican (Pelecanus occidentalis) was listed as endangered throughout its U.S. range on October 13, 1970, and in its foreign range on June 2, 1970, because of sharp population declines, the threat of further declines from pesticide-contaminated food supplies, and the uncertain status of the species in other.