How frog lays eggs

After the common frog returns to the pond where it was born, it mates. The female releases eggs from her belly, which the male inseminates.Spawn 
The common frog lays over 3000 eggs in the water. It leaves the spawn alone. The eggs are surrounded by a transparent, gelatinous mass that protects and warms them from bumps.Tadpole with external gills 
After about three weeks, tadpoles hatch from the spawn, and tree-like gills grow out of their heads. Tadpoles get oxygen from the water with their gills and therefore do not need to emerge.Tadpole with internal gills 
A fold of skin grows over the gills. With their beak-shaped mouth and tiny horny teeth, the tadpoles grate algae from aquatic plants and stones.Tadpole with hind legs 
The tadpoles are still using their gills. They breathe in water that flows through the gills. The used respiratory water exits through a hole on the side. At the end of the body the two hind legs begin to develop.Lung breathing 
The front legs are formed in the two gill pockets. The tadpoles lose their gills and start breathing. That's why they have to appear more often now.Young common frog 
When the tadpoles leave the water, they need stones or a gently sloping bank to climb up. If this is missing, they drown. The burbot has become a young common frog, whose oar tail is gradually receding.Adult common frog 
The frog has left its pond and is looking for damp meadows and forests. He hunts insects and snails. In two years he will return to his home pond to father offspring.