In the 1950s, the Thames was declared "biologically dead" due to industries disposing of chemicals, heavy metals, oils and dyes into the water. Since then, continued action and policy have seen the return of beloved species such as harbour porpoises and wading birds. However, experts warned the hard-earned resurrection was being threatened by climate change and pollution. Fox Photos The updated State of the River Thames health check report collated
The wolves were originally thought to be from separate groups but were declared a pack after a pup was seen with them on a remote trail camera, according to Fish and Wildlife spokesperson Peter Tira. Fish and Wildlife declares a group of wolves a pack if there is evidence of reproduction, along with other criteria, Tira told SFGATE in an emailed statement.