Wildfowl and Wetland Trust scientists have investigated the decrease in pochard numbers.
Mammals, amphibians and invertebrates most likely to be negatively affected by the sudden influx of saltwater.
Aside from the resemblance, a scientist wants to bring attention to an unknown species in the USA.
First ever video footage of common and snow leopards on the Tibetan Plateau raises concerns for conservationists.
Researchers have created a global map of non-native birds.
Photos allegedly show a Japanese vessel with a dead minke whale inside an Australian whale sanctuary.
Increased numbers of sea lice in farmed salmon could affect wild fish too.
The Environmental Audit Committee says new act is needed after Brexit.
Researchers say that an orca known as Granny has not been seen since October.
Vocal dialects of sperm whales found around the Galápagos Islands have changed, according to new research.