Sun-Basking Lizard

A Close Encounter with a Viviparous Lizard.

 It's a beautiful day in the countryside, and as I'm out for a walk, I spot something basking in the sun on a nearby rock. As I get closer, I realise it's a common lizard, a species native to the UK and one of the most commonly seen reptiles in the country.

The common lizard is a small and slender species, reaching only about 15 cm in length when fully grown. They are a greenish-brown color, with darker crossbands running down their backs and tails. Their scales are smooth and shiny, and they have long, thin legs and a pointed tail.

Also known as the viviparous lizard (Zootoca vivipara), is a species of reptile native to Eurasia. It is known for being able to survive in the northernmost regions of any non-marine reptile and for its unique reproductive process. Unlike other reptiles, which lay eggs, the common lizard is viviparous, meaning it gives birth to live young. The scientific names "Zootoca" and "vivipara" both refer to this ability, with "Zootoca" coming from the Greek word for "live birth" and "vivipara" coming from the Latin word for the same. Prior to 2007, the it was classified in the genus Lacerta, but a study by Arnold, Arribas, and Carranza split the genus into nine separate genera, resulting in the common lizard being reclassified as Zootoca vivipara.

As I watch, the lizard seems to be enjoying the warm sun on its back. It's a common behaviour for reptiles, who rely on external heat sources to regulate their body temperature. This is known as thermoregulation, and it's important for lizards (and other reptiles) to be able to do it effectively in order to survive.

I can see the lizard's sides slowly rising and falling as it breathes, and every so often it flicks its tongue out to taste the air. It's a peaceful scene, and I feel lucky to have stumbled upon it.

These lizards are fascinating creatures, and seeing one sunning itself on a rock is a special treat. They are an important part of the UK's biodiversity, and it's important that we do our part to protect them and their habitats. If you're out for a walk in the countryside and you see a common lizard, take a moment to appreciate it and then let it be on its way. They are a joy to watch, and we should all do our part to help them thrive.