Rissa tridactyla Biometrics

Wingspan: 95 - 120 cm (Beaman & Madge, 2011)
Total length: 38 - 40 cm (Beaman & Madge, 2011)
Weight: 300 - 500 g (Hume, 2002)

Status

Madeira local status by Correia-Fagundes et al, 2021: Occasional
Madeira local status by Romano et al, 2010: Occasional
Madeira local status by Zino et al, 1995: Seasonal
Conservation status by the IUCN Red List Categories, 2013: Least Concern ver 3.1