flying flamingos in estuario do sado , portugal

estuary coastal portugal biodiversity abundant fishing tranquil flamingos nature birdwatchers wildlife habitat conservation landscape water birds estuarine ecosystem environment tidal salt saltwater marine life bird birdwatching destination reserve ecological diversity environmental protection ecology scenery serenity tranquility tourism travel portuguese coastline sado flamingo fly flying natural lake wood forest tree trees estuario national park stunning rich park's vibrant population portugal