“The Chinese mitten crab, … named because of a hair-like covering on their claws, was found in the river Clyde in June. … As well as outcompeting other marine life, they cause erosion by damaging riverbanks and impact infrastructure such as dykes when they burrow into them. Research by the Natural History Museum has shown they can eat salmon and trout eggs.” (http://www.theguardian.com/environment/2014/sep/26/invasive-chinese-mitten-crab-found-in-scotland-prompts-salmon-fears)
Crittur wi’ claw cozies compliant wi’ Caledonian climate.
“The emerald ash borer … beetles’ larvae feed on the surface layers of the wood of [the ash] tree, cutting off vital supplies of nutrients and water, causing branches and eventually the whole tree to die.” (http://www.bbc.co.uk/news/science-environment-24612322)
The European ash may be bored to death.