Add Yahoo as a preferred source to see more of our stories on Google. CHAMPAIGN-URBANA, Ill. (WCIA) — University of Illinois researchers studying an invasive species of crayfish recently made a unique ...

ALEXANDRIA, Minn. — Yet another aquatic invasive species has invaded a Minnesota lake — this time the signal crayfish, a native of the Pacific Northwest confirmed in Lake Winona. The Minnesota ...

Stephen Swanson is a web producer at CBS News Minnesota. Stephen was a floor director for a decade before moving to the WCCO-TV newsroom in 2011, where he focuses on general assignment reporting.

The non-native and potentially invasive signal crayfish has appeared for the first time in Minnesota, prompting the state to warn that they are illegal without a permit. Officials confiscated 10 ...

North American signal crayfish, which are like miniature lobsters, were originally brought to the UK 50 years ago to be farmed for European markets A man licensed by the Environment Agency to trap an ...

Aggressive American signal crayfish are threatening Britain's native white-clawed crayfish populations because they have better resistance to parasites and are less fussy about what they eat.

Forget Nessie: there's another insidious creature living in the waters of Scotland. The story starts in the streams and lakes of the northwestern United States, where North American signal crayfish ...