Pink eggs in the garden: invasive snails on the rise. Pink eggs that cling to aquatic plants or pond edges are probably the clutches of the invasive apple snails (Pomacea) Apple snails, originally from South America, are considered voracious pests that can decimate plants and animals of the species native to Germany.
Their uncontrolled reproduction threatens the ecological balance in this country and could completely displace other species. Controlling the genus Pomacea is difficult and they have no natural enemies in these latitudes.