Figure 2. A in Quantitative assessment of species identification in aerial transect surveys for ice-associated seals

Figure 2. A red face, which is one of the characteristics associated mostly with bearded seals, is not always present, nor is it necessarily visible in an aerial image. The image on the right was taken with a Canon 1Ds Mark III fitted with a Zeiss 100 mm lens from 300 m during a 2012 line transect survey in the Bering Sea. In this image, an observer would likely rely on the combination of body shape, head size, front-flipper size and shape, and position on the floe to conclude that the seal is probably or certainly a bearded seal.