When young birds live in the open, as on shingly beaches, then their down is mottled. How perfectly this harmonises with the surrounding stones only those who have tried to find young terns, or young ringed plover, for example, can tell.
When young birds live in the open, as on shingly beaches, then their down is mottled. How perfectly this harmonises with the surrounding stones only those who have tried to find young terns, or young ringed plover, for example, can tell.