The UK has seen one on the warmest winters ever on record and this has meant that slug numbers are on the rise.
The milder weather has resulted in slugs not going into hibernation, which means they have been more active than usual.
Experts have warned that the rise in slug numbers could be devastating for British gardens.
Matt Shardlow, chief executive of Buglife, said: “Due to climate shifts, warmer winters and wetter summers, we’re seeing slugs become active all year round.
“Whereas key predators like amphibians will only lay their eggs once a year, slugs are not so restricted.
“Coupled with the fact that general slug varieties are also reaching full size earlier than ever, gardeners are simply not getting any respite and need innovative management solutions.
“The impact of super-sized, sleepless slugs could spell devastation for our gardens this summer.”
Slugs stay active when temperatures are above 5C and this winter was the warmest since records began in 1910, with temperatures around 7.9C.