The family of a student who went missing after visiting a RSPB nature reserve over three weeks ago has appealed for information from the public.

Emergency services are searching for Adam Seaton, 20, who has not been seen since he left his home in Southport, Merseyside, on 9 August. Police believe the geography student drove his mother’s Ford Fiesta to nearby RSPB Marshside nature reserve, which he was planning to study in a university project according to his family.

Merseyside police have asked members of the public who visited the nature reserve on the day Seaton went missing to check dashcam footage and contact them with information relevant to the search.

The Edge Hill university student is 6ft 2in (1.9 metres), slim, and has brown hair and brown eyes. He was last seen wearing a burgundy tracksuit top with “France” embossed on the arm, a black-and-white T-shirt, blue jeans and burgundy Puma trainers.

Please RT. It is three weeks today (Thursday) since @edgehill student Adam Seaton was last seen in the #Marshside area of #Southport. Have you seen him or anyone who looks like him? Can you help our appeal? DM @MerPolCC, call 101 or contact @missingpeople https://t.co/A2sqqnHufi pic.twitter.com/L7jcvlz6tk — Merseyside Police (@MerseyPolice) August 30, 2018

His parents, Andrew and Karen Seaton, said their son’s disappearance was “absolutely out of character”, describing him as a homebird.

The 20-year-old called a friend but lost signal on the day he disappeared, but there have been no reported sightings of him at the nature reserve, according to Mrs Seaton.

Anyone who has seen Adam or knows of his whereabouts is asked to send a Twitter direct message to @MerPolCC, call 101 or contact Missing People on 116 000.