Flamingo - easy to observe in the Tagus estuary throughout the year, even though it does not breed here. More numerous from the end of summer until winter.
Black-shouldered Kite - a resident species in the Tagus estuary, this raptor is confined to Iberia Peninsula in Europe . During winter, numbers are very
high in the estuary, and roosting sites with over 60 individuals have been observed.
Purple Heron - this colourful species is declining all over Europe. In the Tagus estuary, over 150 pairs breed in reed beds and feed frequently on drainage ditches in farmland.
Collared Pratincole - a summer visitor to the Tagus estuary,
where several dozens of pairs breed in ploughed parcels.
Introduced species - a considerable number of African passerines introduced in Portugal (mostly over the last 20 years) adapted well to the wetlands of the Tagus estuary. Most frequent species include Common Waxbill, Red Avadavat, Black-headed Weaver and Yellow-crowned Bishop.