Which bird can be seen and heard in the sea?
Answers
Answer:
About 300 species of birds live on or near the ocean, feeding on fish and other marine life. They include penguins, skuas, gulls, guillemots, terns, puffins, auks, skimmers, albatrosses, petrels, shearwaters, fulmars, frigate birds, gannets, boobies, cormorants, shags, tropicbirds and pelicans.
Explanation:
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Answer:
In-air hearing sensitivities have been measured for many species of birds. Sound provides birds with information for individual recognition, as well as foraging and predator avoidance cues. However, diving birds often live in hard-to-study areas, and thus, data on the hearing abilities of aquatic birds, especially measurements of their underwater hearing, is lacking. Over 800 species of birds rely on the aquatic environment. Some species, like ducks, can dive to only a few meters, others, like penguins, can dive to over 500 m. Diving birds may depend on underwater sound for navigation. Some birds, such as penguins, auks, murres, and cormorants, may also use sound to locate and pursue prey.
Some aquatic birds possess auditory adaptations for hearing underwater. For example, murres and auks have a special structure that creates a barrier over the external ear opening (birds do not have external flaps, or pinna). Penguins have active muscular control of their ear opening. King penguins also have a venous structure in their middle ear that, when engorged with blood, may act as a pressure regulator for the inner ear during diving. This is similar to structures and muscles that surround its external ear and may constrict it, isolating the tympanic membrane from the surrounding waters.
Explanation:
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