German educational film: birds and their habitats

German educational film, begins with the following intertitle: "Sturm-und Mantelmowen": VS, of birds along the shore, some shots with them standing on the sand, at the waters edge, other shots of them flying above the water. Second intertitle reads: "Strandlaufer" : VS, birds along the beach, walking, poking their beaks in the sand, etc. Third intertitle reads: "Steinwalzer": VS, birds continue to walk along the water's edge. Fourth intertitle reads: "Austernfischer": VS, birds of a different species at the water's edge. They take flight. One of the birds lands in marsh grass. CU, three unhatched speckled birds' eggs. CU, a hen standing over the eggs, she then sits on top of them. Fifth intertitle: "Seeschwalben": VS of birds along the shore, quick cut to a CU of two speckled eggs, CU of another species of bird, warming her eggs in the marsh grass. CU, a chick hatches from one of the eggs. CU, both chicks have hatched, they remain huddled close together, their mother arrives with food for them and feeds them. MS, other members of the flock appear, VS, the baby chicks begin to move about and explore their habitat under the watchful eyes of their mother.