More than 1,000 foreign visitors alone are expected to take part in the seven-day Sagres Birdwatching Festival which ends on Sunday next.
The event includes several activities such as birdwatching tours, workshops, field trips and talks with local schools and organisations.
As some of the festival events will be presented in English, organisers SPEA (the Portuguese Society for the Study of Birds) are expecting over 1,000 foreigners as well as residents to visit over the course of the event.
Sagres is known throughout Portugal as a rewarding venue for ornithologists and nature lovers and sees many species, particularly soaring birds, flock to the area between August and November every year.
The festival aims to attract participants with differing tastes, expectations and knowledge, making it ideal for families, students, nature lovers and birdwatchers of all levels of experience.