Djoudj National Bird Sanctuary, a UNESCO World Heritage site, is a vital wetland in the Senegal River delta, offering refuge to millions of migratory birds, especially during the European winter (November to May), making it the best time to visit. Accessibility within the park is primarily by boat or 4x4 vehicle due to the marshy terrain; guided tours are highly recommended to maximize birdwatching opportunities and navigate the area effectively. Solo exploration is possible but less rewarding without local expertise. Expect to spend at least half a day to fully appreciate the sanctuary's biodiversity. Costs involve park entrance fees and potentially guide fees, varying depending on the tour operator, but generally affordable. Note that the park's avian population significantly decreases outside the migratory season.