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A humpback whale (Megaptera novaeangliae) A leopard seal (Hydrurga leptonyx). Marine mammals are mammals that rely on marine (saltwater) ecosystems for their existence. They include animals such as cetaceans (whales, dolphins and porpoises), pinnipeds (seals, sea lions and walruses), sirenians (manatees and dugongs), sea otters and polar bears.
Leonardo da Vinci made notes for a planned anatomical treatise in which he intended to compare the hands of various animals including bears. [4] Pierre Belon, a French naturalist born in 1517, conducted research and held discussions on dolphin embryos as well as the comparisons between the skeletons of birds to the skeletons of humans. His ...
The Greeks admired the dolphin as a "king of the aquatic animals" and referred to them erroneously as fish. Its intelligence was apparent both in its ability to escape from fishnets and in its collaboration with fishermen. River dolphins are known from the Ganges and—erroneously—the Nile. In the latter case it was equated with sharks and ...
The list of animals that polar bears consider prey is long, but up until recently it wasn't known to include white-beaked dolphins. A team of scientists working in icy Svalbard, Norway in 2014 ...
The dolphins may also scare them using sound or by flashing their white bellies. [36]: 121 The larger the group, the more effective they are in herding the school. [44] These hunts may also involve other species, including other dolphins, seabirds, sharks, and pinnipeds. [32] [44] Common dolphins seem to participate in herding with dusky dolphins.
The dusky dolphin prefers cool currents and inshore waters, but can also be found offshore. It feeds on a variety of fish and squid species and has flexible hunting tactics. The dusky dolphin is known for its remarkable acrobatics, having a number of aerial behaviours. The status of the dolphin is unknown, but it has been commonly caught in ...
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Deer-vehicle collisions are surprisingly common in the United States, with 2.1 million occuring each year, accounting for 59,000 human injuries and 440 human deaths.