It isn’t true that dolphins have returned to Venice, but bees are benefitting from lower air pollution, and a drop in ocean traffic could be good for whales
Source:
https://www.newscientist.com/article/2244359-which-animals-are-benefitting-from-coronavirus-lockdowns/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home