airinho-de-bico-comprido vs torda-miúda

The Long-billed Murrelet and Little Auk can be distinguished by their bill size and shape, with the Long-billed Murrelet having a notably longer and more slender bill. In terms of plumage, the Little Auk is generally darker and more uniform in color.

Bill size and shape: Look for the Long-billed Murrelet's longer and more slender bill compared to the shorter bill of the Little Auk. Plumage: Note the darker, more uniform plumage of the Little Auk.

The Little Auk tends to have darker and more uniform plumage compared to the Long-billed Murrelet.