Leave behind the medieval walls of Óbidos and step into a completely different world — a place where nature dictates the rhythm, tides draw new landscapes every day, and birds from three continents gather to rest, feed, and nest. This is the Lagoa de Óbidos, Portugal’s largest coastal lagoon, and one of the most fascinating wetland ecosystems in the country.

Begin your birdwatching experience at a quiet viewpoint overlooking the lagoon. Here, the waters are shallow, nutrient-rich, and protected from ocean currents, creating ideal feeding grounds for dozens of species. The moment you arrive, the sounds shift — the distant chatter of waders, the splash of a cormorant diving, the rustle of reeds swaying in the wind. The medieval charm of Óbidos remains close, but the ambience transforms into pure tranquility.

From here, accompanied by an experienced local guide, learn to observe the lagoon the way a nature researcher does: slowly, patiently, allowing the landscape to reveal its secrets. Every day the bird composition changes. Every season brings new colours.

The Óbidos Lagoon is a rare survivor. Throughout history, there were three major lagoons in this region, but only Óbidos resisted the transformation of the coastline over the centuries. Its survival has always depended on a unique human effort: the opening of the channel to the Atlantic Ocean, known locally as a “Aberta.”

In medieval times, this connection between lagoon and ocean was opened manually. Local communities used hoes and ox-drawn carts to dig the channel whenever it closed due to natural silting. This was essential not only to renew the lagoon’s waters, but also to drain nearby farmland for agriculture. Today, the opening is done using mechanical equipment, as the progressive silting requires frequent dredging to ensure the lagoon remains alive and thriving.

As you begin using your binoculars (provided by us), your guide will help you identify different species by silhouette, colour, flight pattern, and behaviour. Flamingos are often the first to catch the eye — entire flocks of pink birds feeding gracefully in still water during low tide.

Other species frequently seen include:

• Great Egret (Garça-branca-grande) — elegant, white, slow-moving, hunting along the shore
• Eurasian Spoonbill (Colhereiro) — unmistakable with its spoon-shaped bill sweeping the water from side to side
• Cormorants (Corvo-marinho-de-crista) — masters of diving and fishing in the lagoon
• Kingfisher (Guarda-rios) — a flash of intense blue darting above the water
• Little Grebe (Mergulhão-pequeno) — repeatedly diving and resurfacing
• Northern Shoveler (Pato trombeteiro) — ducks easily recognised by their large, wide beaks
• Common Kestrel (Peneireiro-vulgar) — hovering above the fields, scanning for prey
• Grey Heron (Garça-real) — silently waiting for fish, a timeless symbol of patience