European green lizard

The European Green Lizard (Lacerta viridis)

The European green lizard (Lacerta viridis) is a prominent reptile native to the mid-latitudes of Europe. Its range extends widely from countries like Slovenia and Austria eastward to the Black Sea coasts of Ukraine and Turkey. This lizard is commonly observed basking in sunny spots on rocks or lawns, and it often seeks refuge within dense bushes.

Physical Description and Characteristics

Adult European green lizards can reach an impressive size, typically measuring up to 15 cm from the tip of the muzzle to the cloaca. Their tails are notably long, capable of being up to twice the length of their body, leading to a maximum total length of around 40 cm. A distinctive feature is their ability to shed their tail, a defensive mechanism known as autotomy, which allows them to escape predators, with the tail later regrowing.

Males are generally characterized by a larger head and a vibrant, uniform green coloration that is punctuated by small spots, particularly noticeable on their backs. The throat of the adult male often displays a bluish hue. Females, in contrast, are more slender and tend to have a more uniform coloration. They frequently feature between two and four light bands that are bordered by black spots, providing a different visual signature.

Distribution and Habitat

The species' natural habitat spans southeastern Europe, encompassing regions from southern Germany and Austria across to Hungary, the Czech Republic, Slovakia, and extending through the Balkan Peninsula to Ukraine, Romania, Bulgaria, and western Turkey. These lizards can be found in diverse environments, often preferring dense bushy vegetation situated in open woodlands, along hedgerows, field margins, embankments, and within bramble thickets. While they can inhabit elevations up to 2,200 meters, their specific habitat preferences vary geographically; in the northern parts of their range, they might be found on bushy heathland, whereas in the southern areas, they lean towards damper locations.

Behavior, Diet, and Reproduction

European green lizards are primarily terrestrial and are often seen active on the ground or within low, dense vegetation. They are heliophilic, meaning they enjoy basking in the sun to regulate their body temperature, typically doing so early and late in the day. Their diet is varied, consisting mainly of insects and other small invertebrates. However, they are opportunistic feeders and will also consume fruit, bird eggs, fledglings, smaller lizards, and even mice.

Reproduction occurs seasonally, with females laying between six and twenty eggs during the spring. The incubation period for these eggs typically ranges from two to four months. Newly hatched juveniles are a pale brown color and measure about 3 to 4 cm in snout-to-vent length. They mature rapidly, usually doubling in size by the following year.

Conservation and Threats

The International Union for Conservation of Nature (IUCN) currently lists the European green lizard as a species of 'Least Concern'. This designation is attributed to its extensive geographic range and its common status within significant portions of that range. The species is considered adaptable, and no substantial threats have been identified across most of its distribution. Nevertheless, in certain regions, such as Turkey, the use of pesticides is noted as a potential threat to their populations.

Taxonomy

There is ongoing scientific discussion regarding the exact taxonomic classification of Lacerta viridis. Genetic data has provided some, albeit weak, support for separating it from Lacerta bilineata into two distinct species, indicating that further research is necessary to clarify their taxonomic relationship.