It is believed to be one of only a handful of sightings recorded in England this year.
A wildlife trust says unusually hot weather and increased monitoring has led to interesting finds.
The Essex Skipper is typical of the south of England and is rarely seen as far north as Teesside.
Typical gardens would only have between five and 10 different species of butterfly.
Bournemouth, Christchurch and Poole are home to many important butterfly sites, says authority.
Land behind St Stephen's shopping centre, in Hull, is now home to 10 species of butterfly.
A patch of land in Hull city centre has been allowed to grow wild to create a haven for insects.
A scientist says Britain could be on the verge of a bumper summer for butterflies.
A hot and dry spring means a greater variety and more butterflies across the UK, a charity says.
