The Maasdalbeek originates in the Maasdalbos. Spring water also bubbles up here locally. This creates special plants, the most striking of which is the marsh marigold. There are also many shrubs here. The blackthorn butterfly is a butterfly that lives in blackthorn thickets or at the edge of forests. It likes warm sunny places. The female lays her eggs in the leaf axils of the blackthorn. The eggs are smaller than a pinhead and look like a squashed golf ball. Look for the eggs in winter or early spring, when the shrubs do not yet have leaves and flowers.
Furthermore, small springwort, thick-grained moss, blue tuberous curtain mushroom, blue-spotted knight's mushroom and wild hyacinth grow here. The population of bats, including the pipistrelle bat and the water bat, is expanding. More and more deer are also being spotted. Numerous birds, such as the tawny owl, the sparrowhawk, the buzzard, the black woodpecker and the woodcock, also do well here. The pin-legged salamander can also be found here.