Gaviota Rosada vs Gaviota Marfileña

Ross's Gull and Ivory Gull are both Arctic species, but they can be distinguished by their size and plumage. Ross's Gull is smaller with a more delicate appearance, while the Ivory Gull is larger and entirely white. These differences are most apparent when observed together or with other species for scale.

Size and plumage: Note the smaller size and pinkish hue of Ross's Gull compared to the larger, all-white Ivory Gull.

Ross's Gull is smaller and more delicate compared to the larger Ivory Gull.

Ross's Gull has a pale pinkish hue and a wedge-shaped tail, while the Ivory Gull is entirely white with no color variation.