Essays about: "mixed singing"
Found 2 essays containing the words mixed singing.
University essay from Uppsala universitet/Institutionen för biologisk grundutbildning
Abstract : The closely related species pied flycatcher (Ficedula hypoleuca) and collared flycatcher (F. albicollis) co-occur on the Swedish island of Öland, where they compete over similar resources. The majority of male pied flycatchers have been found to incorporate elements of the collared flycatcher song in their repertoire. READ MORE
University essay from SLU/Dept. of Ecology
Abstract : Along with other European farmland birds, the skylark (Alauda arvensis) has declined rapidly since the 1970’s. Between 1975 and 2003, the Swedish population of skylarks declined with 64 %. In Britain, the decline is often explained by alterations in farming practices in general and the shift from spring-sown to winter-sown cereals in particular. READ MORE