Cuvier's Beaked Whale
Ziphius cavirostris
Similar species
All other small to medium-sized beaked whales and at a distance, possibly, small baleen whales such as minke whales. With reasonable views, the shape of the head and beak should be sufficient to identify this species.
Identification
Among the largest and most distinct of the beaked whales. Compared with smaller species, it is more robust, broad and deep-bodied. As with most beaked whales, identification may depend on good views of an adult male. Cuvier`s Beaked Whale does not have an obvious `beak`. Instead, the melon slopes down to a snout shaped somewhat like a `goose-beak` (giving this species its other common name, Goose-beaked Whale). Surfacing action is a significant identification character. Cuvier`s have been described as `lurching` out of the water then they seem to drop their head to plunge down before rolling. Colour may not be a useful identification feature as it can vary from blue-grey to brick red depending on the age of the animal and how active it is. The head and upper surface as far back as the dorsal fin become progressively whiter with age, while the flanks may darken. Older animals also accumulate scratches from fights with other males and oval scars resulting from attacks by cookie-cutter sharks. May form family groups, though older males are thought to live alone. The blow may be visible on calm days but is small and diffuse. As with other beaked whales, Cuvier`s Beaked Whales usually remain at the surface for a short time and dive for periods of between 30 minutes and an hour.
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