Mediterranean Turtle: where and when to see them

The Spanish pond turtle is a freshwater reptile of southwestern Europe and northwestern Africa, rather than a land tortoise. In Portugal it inhabits quiet waters where sunny banks and exposed logs provide basking places. Its olive to brown shell often looks plain at a distance, while yellowish neck stripes become apparent through binoculars. Wetland drainage, road mortality, pollution and competition with introduced turtles can affect local populations.

Size

Carapace length 15–25 cm

Weight

Not reliably established

Lifespan

Not reliably established

Status

Check current assessment

These turtles alternate between feeding in water and basking to regulate body temperature. Several may share a convenient log, but they usually slip into the water when approached. Activity changes with temperature, and cold periods can bring prolonged inactivity. Females leave the water to dig nests in terrestrial soil, sometimes crossing roads. Young animals tend to use sheltered shallow margins, where vegetation provides cover from birds and other predators. They are capable of estivation, burying themselves in mud during dry periods to survive drought. Males often engage in elaborate courtship rituals, which may include head bobbing and chasing females in the water.

• Females are generally larger than males.
• The species occurs naturally on both sides of the Strait of Gibraltar.
• Its webbed feet suit freshwater movement, unlike the stout feet of land tortoises.
• Basking helps regulate temperature and supports normal physiological functions.

Spring through early autumn generally offers the best opportunity to notice active turtles in Portugal. Mild sunny mornings can encourage basking, whereas intense summer heat may reduce exposure. Water levels and local weather matter more than a fixed calendar, and nesting activity should never be disturbed. During especially dry years, water bodies may shrink, concentrating turtles and making them easier to spot, but also increasing competition and stress. Warmer water temperatures in spring stimulate increased activity levels, including foraging and mating displays.

Slow rivers, ponds, reservoirs, irrigation channels and seasonal wetlands can support this species. It needs accessible basking surfaces, refuge in deeper water or vegetation, and nearby ground suitable for nesting. Some populations tolerate mildly brackish conditions, but it remains principally a freshwater turtle. They are often found in areas with soft substrates like mud or sand, which they use for burrowing or resting. While primarily freshwater, they can also adapt to certain coastal lagoons or estuaries where salinity levels fluctuate.

An opportunistic omnivore, it eats aquatic invertebrates, carrion, small vertebrates and plant material. The balance changes with age and availability, with younger turtles generally taking more animal food. Feeding wild turtles bread or other human food can degrade water quality and alter natural behaviour. Their strong jaws are well adapted for crushing snail shells and the exoskeletons of aquatic insects. Juveniles are particularly vulnerable and consume more protein for rapid growth, making small aquatic invertebrates a crucial food source for them.

Common name

Mediterranean Turtle

Scientific name

Mauremys leprosa

Animal group

Reptiles

Size

Carapace length 15–25 cm

Weight

Not reliably established

Lifespan

Not reliably established

Status

Check current assessment

Identification

Compared with the European pond turtle, it usually has longitudinal yellow neck stripes rather than numerous yellow dots across a dark head and shell. The plastron (under shell) is typically yellow, often with dark spots or patches, which can vary geographically. Some individuals may exhibit a reddish or orange tint on their plastron or limbs, particularly in older specimens.