National newspapers this week reported a colony of deadly snakes were living near Regents Canal in Camden Lock.
But Professor Susan Evans from University College London has told London Live the Aesculapian snakes, nicknamed the Camden Creatures, are non-venomous and not a threat to humans.
Up to 30 of the snakes, which can grow as long as 2 meters, have been living in the area for about 30 years and are believed to be descended from snakes which escaped from London Zoo.
Prof Evans said: “The only thing they are likely to take down are little rats or mice and a few baby birds.
“They’re not going to attack people.”
She added the serpents were hard to find but would most likely to be seen warming themselves in trees or bushes.