Sedge Warbler (Acrocephalus schoenobaenus) - a tiny bird that sings loudly in rushes, wet thickets, sedges with rushes and reeds. Its characteristic feature is a distinct fawn eyebrow contrasting with the dark, lined brown-gray coat. The underside of the body is uniformly beige. He builds a cup-shaped nest among water plants. Sedge Warbler breeds one or two broods a year. In September, it flies to distant wintering grounds in Africa. Earlier, it accumulates fat reserves, doubling its mass. He takes short breaks during his hike. However, when flying over the Sahara, he does not take breaks and then loses all the water and fat in his body. When it reaches the wintering area, it weighs much less than before the beginning of the autumn migration. Late summer is a period of intensive foraging of migrating birds in order to gather energy for long journeys to wintering grounds. The observation of songbirds in Roztocze is a great therapy for body and soul.