A CSIC study concludes that the booted eagle's hatching and reproductive success has decreased with the concentration of banned organochlorine pesticides.
Between 1999 and 2021, scientists detected 26 pesticides in the eggs of seven bird species, including black kites and white storks.

Organochlorine (OC) pesticides and the more persistent polychlorinated biphenyls (PCBs) have well-established dose-dependent toxicities to birds, fish and mammals in experimental studies, but the actual impact of OC pollutants on European marine top predators remains unknown. Here we show that several cetacean species have very high mean blubber PCB concentrations likely to cause population declines and suppress population recovery.