Surrey Amphibian and Reptile Group (SARG) 

Species Status by Region

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Native Reptiles of the British Isles

SpeciesEnglandNorthern
Ireland
ScotlandWalesEireIsle
of Man
Channel
Islands
Adder
Vipera berus
YesNoYesYesNoNoNo
Common lizard
Zootoca vivipara
YesYesYesYesYesYesNo
Grass snake
Natrix natrix
YesNoNo1YesNoYesYes3
Sand lizard
Lacerta agilis
YesNoNoYes2NoNoNo
Slow worm
Anguis fragilis
YesNoYesYesNoNoYes3
Smooth snake
Coronella austriaca
YesNoNoNoNoNoNo
Common wall lizard
Podarcis muralis
NoNoNoNoNoNoYes3
Western green lizard
Lacerta bilineata
NoNoNoNoNoNoYes3
1 Technically, this is a "Yes", as Grass snakes can be found in Scotland, and they do even breed on occasion in certain localities, however; the English/Scottish border is the generally accepted northern limit of the Grass snake's range in the UK.
2 For a while, the Sand lizard became extinct in Wales, but has since been sucessfully re-introduced.
3 Only native on Jersey.

Established (breeding) Introduced Reptiles of the British Isles

SpeciesEnglandNorthern
Ireland
ScotlandWalesEireIsle
of Man
Channel
Islands
Sand lizard
Lacerta agilis
N/aNoYesNoNoNoNo
Common wall lizard
Podarcis muralis
YesNoNoYesNoNoN/a
Western green lizard
Lacerta bilineata
YesNoNoNoNoNoYes1
Aesculapian snake
Lacerta bilineata
YesNoNoYesNoNoNo
Slow worm
Anguis fragilis
N/aNoN/aN/aNo2NoYes3
1 Native on Jersey, however the Guernsey colony was introduced from Jersey stock.
2 There was an apparently failed attempt to introduce the Slow worm to Eire in the 1970s.
3 A native of Jersey, the Slow worm has been introduced to all other Channel Islands except Sark.

Native Amphibians of the British Isles

SpeciesEnglandNorthern
Ireland
ScotlandWalesEireIsle
of Man
Channel
Islands
Common frog
Rana temporaria
YesYesYesYesYesYesNo
Smooth newt
Lissotriton vulgaris
YesYesYesYesYesNoNo
Common toad
Bufo bufo
YesNoYesYesNoNo Yes1
Great crested newt
Triturus cristatus
YesNoYesYesNoNoNo
Natterjack toad
Epidalea calamita
YesNoYesYesYesNoNo
Palmate newt
Lissotriton helveticus
YesNoYesYesNoNoYes2
Pool frog
Pelophylax lessonae
YesNoNoNoNoNoNo
Agile frog
Rana dalmatina
NoNoNoNoNoNoYes2
1 Native on Jersey (locally named the Crapaud or Jeriais), where it grows larger in size than on the British mainland.
2 Only native on Jersey.

Established (breeding) Introduced Amphibians of the British Isles

SpeciesEnglandNorthern
Ireland
ScotlandWalesEireIsle
of Man
Channel
Islands
Common frog
Rana temporaria
N/aN/aN/aN/aN/aN/aYes
Marsh frog
Pelophylax ridibundus
YesNoNoNoNoNoNo
Edible frog
Pelophylax kl. esculentus
YesNoNoNoNoNoNo
Pool frog (non-Northern clade)
Pelophylax lessonae
YesNoNoNoNoNoNo
Iberian water frog
Pelophylax perezi
YesNoNoNoNoNoNo
North American Bullfrog
Lithobates catesbeianus
YesNoNoNoNoNoNo
Common toad
Bufo bufo
N/aNoN/aN/aNoNoYes1
African clawed toad
Xenopus laevis
YesNoNoNoNoNoNo
Midwife toad
Alytes obstetricans
YesNoNoNoNoNoNo
Italian crested newt
Triturus carnifex
YesNoNoNoNoNoNo
Alpine newt
Mesotriton alpestris
YesNoNoNoNoNoNo
1 Although a native of Jersey, the Common toad is an introduced species to Guernsey.