https://www.post-gazette.com/sports/hunting-fishing/2011/03/20/artificial-nesting-sites-saved-the-wood-duck/stories/201103200186
Artificial nesting sites saved the wood duck | Pittsburgh Post-Gazette
Whenever I drive along a bottomland forest, especially one with giant hollow sycamores, I expect to see wood ducks.
nesting sitesthe woodpittsburgh postartificialsaved
https://www.usgs.gov/programs/environmental-health-program/science/chemical-combo-and-intersex-fish-found-smallmouth
Chemical Combo and Intersex Fish Found at Smallmouth Bass Nesting Sites | U.S. Geological Survey
Chemical contaminants including herbicides, veterinary pharmaceuticals, and biogenic hormones have been detected at fish nesting sites in the Potomac River...