More than 70 species of birds breed in the nature reserve of Siikalahti. The area also provides a stop-off place for various migratory birds, and consequently over 250 species have been spotted in the entire bay and its surroundings. Siikalahti offers plenty to see in all seasons. In spring, the song of migratory birds fills the air and the deciduous woods are at their most verdant. June is the best month for listening to ‘night singers’. In late summer, visitors are delighted by the variety of dragonflies. In autumn, thousands of migratory birds stop off in the area.