Sand Lizard
Lacerta agilis
The sand lizard is a robustly built lizard reaching a total length of up to 25 cm. A striking feature is the pronounced sexual dimorphism, with males developing bright green flanks during the mating season. It primarily inhabits sun-exposed, structurally diverse habitats such as dry grasslands, heathlands, and railway embankments with open soil patches. As an ectothermic animal, it specifically uses basking spots for thermoregulation and spends the winter in hibernation within frost-proof shelters.
Details
Identification
Robust build, short head, brown dorsal band with chains of light spots, green flanks in males.
Social behavior
Predominantly solitary; males aggressively defend territories and females during the mating season.
Diet
Feeds on insects such as grasshoppers and beetles, as well as spiders, woodlice, and occasionally juveniles.
Hunting strategy
Combination of active foraging and ambush hunting on the ground.
Spawning substrate
Sunny, loose sandy soils for egg deposition.
Overwintering
Hibernation from October to March in frost-proof burrows, under roots, or in rock piles.
Ecology
Ecological role
Important link in the food web as a consumer of invertebrates and prey for birds of prey and snakes.
Natural predators
Kestrel, Buzzard, Red-backed Shrike, Smooth Snake, martens, and domestic cats.
Competitor species
Viviparous lizard (in transition zones), wall lizard (where habitats overlap).
Ecosystem service
Natural pest control through the consumption of insects.
Threats
Destruction of boundary elements, intensification of agriculture, and afforestation of open land.
Scientific profile
Profile
Distinguishing features
Robust build with a short head and blunt snout. White median line on the back often interrupted. Distinct ocellated markings on the flanks. Genus Lacerta.
Habitat
Structurally diverse, sun-exposed transitional habitats: heathlands, dry grasslands, railway embankments, forest edges, quarries, and vineyards with open soil patches.
Diet
Insects (beetles, grasshoppers, cicadas), spiders, woodlice, earthworms, and occasionally their own juveniles (cannibalism).
Role in food web
Secondary consumer; regulates insect populations and serves as important prey for raptors and snakes.
Protection & threats
Main threats
Habitat loss due to land sealing, intensive agriculture (pesticide use), scrub encroachment of open land, and habitat fragmentation.
Population trend
Globally stable (LC), but listed as 'Vulnerable' (Category 3) or on the warning list in Germany's Red List.
Conservation measures
Preservation and networking of edge structures, creation of sandy patches for egg deposition, scrub clearance of heathlands, extensive grazing.