Stopover ecology of the European nightjar Caprimulgus europaeus during autumn migration in south-eastern Sweden
Do European nightjars migrate via Öland in autumn? Bird migration is a common phenomenon of the natural world with at least 4,000 species of birds being regular migrants. Many of those species have to cover long distances from breeding grounds in the northern hemisphere to wintering grounds in the tropics. They often face ecological barriers e.g. deserts or oceans with no food supply. Therefore i