Figure 1 in Quantitative assessment of species identification in aerial transect surveys for ice-associated seals

Figure 1. The characteristic bands on the coats of ribbon seals are not necessarily clearly visible in an aerial image. The images on the top right and bottom right were 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 the top right image, an observer would likely rely on the clearly visible bands to conclude that the seal is certainly a ribbon seal. In the bottom right image, an observer would likely rely on a combination of body shape, head size, flipper size and shape, and what could be one or more bands to conclude that the seal is probably a ribbon seal.