River Friends is a Lisbon-based tour operator focused on guided birdwatching experiences on the Tejo Estuary. Operating from Lisboa, the company runs a signature 3-hour boat tour titled Observação de aves na reserva natural do estuário do Tejo, led by guide Carlos Cera. The itinerary visits Europe’s largest estuary and the protected natural reserve where more than 200 bird species can be observed, including flocks of flamingos that reach counts around 12,000.
Trips depart from locations minutes from central Lisbon, providing convenient access for residents and visitors. The 3-hour format combines scenic cruising with targeted wildlife observation of mudflats, marshes, and estuarine habitats. Boats used on the tour are arranged for daytime viewing and provide close-range opportunities to see waterfowl and wading birds in their natural setting.
Guides on the tour provide species identification and habitat context during each outing, and each departure includes a health and safety briefing. Reservations are available for small groups, and trip listings include practical details such as meeting point, duration, and recommended gear. River Friends’ offerings emphasize naturalist-led interpretation and factual information about avian behavior and habitat, delivering a focused birdwatching experience near Lisbon.
Travelers interested in coastal birdwatching and estuary ecology will find River Friends’ Tejo Estuary tour an accessible option for observing diverse birdlife with local guiding expertise.