Grey squirrels compete with native reds for food
The first grey squirrel to be officially reported in the Highlands has still to be caught.
Conservation project See Red Highland have been trying to trap the animal.
The BBC Scotland News website broke the story in April of experts' suspicions it arrived in Inverness on the back of a lorry carrying hay or straw bales.
The Highlands are deemed to be a stronghold for native reds, free of the risk of competition for food and a disease carried by greys.
See Red Highland said the Inverness grey was spotted again on 27 May.
Traps set for it are being checked daily.