Gannets and Dolphins | BirdNote

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BirdNote®

Gannets and Dolphins Get pleasure from a Feast

Written by Bob Sundstrom

That is BirdNote.

[Northern Gannet calls, http://macaulaylibrary.org/audio/224716, 0.09-.12]

Northern Gannets are fish-eating seabirds. And so they’re unbelievable hunters, aerodynamic, wings tucked again behind them, diving headfirst into the ocean at speeds of as much as 60 miles an hour, pursuing their prey beneath water with highly effective strokes of their webbed ft. However typically, even Northern Gannets get a little bit assist.

[Splashing sounds]

Foraging pods of dolphins frequently herd fish into dense, frantic concentrations close to the floor, the place the fish are simpler to catch. As this occurs, gannets start plunging into the shoals from aloft. The extra tightly massed and nearer to the floor the fish are, the higher the birds’ probabilities of catching some. So the dolphins’ ways are a sort of “help” to the gannets.

[Northern Gannet calls, http://macaulaylibrary.org/audio/224716, 0.09-.12]

Scientists name this a multispecies feeding affiliation, and it occurs lots. These gatherings might look like proof of cooperation between species, however in reality they’re extra about alternative. Gannets, on the very least, reap the benefits of the dolphins’ predatory, fish-herding technique to extra simply seize a meal.

These feeding frenzies might appeal to a mixture of predators. Different seabirds like kittiwakes and gulls, in addition to seals and even whales, might be part of the motion.

At present’s present delivered to you by the Bobolink Basis.

For BirdNote, I’m Michael Stein.

[Northern Gannet calls, http://macaulaylibrary.org/audio/224716, 0.09-.12]

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Bird sounds offered by The Macaulay Library of Pure Sounds on the Cornell Lab of Ornithology, Ithaca, New York. 224716 recorded by Bob McGuire.
BirdNote’s theme music was composed and performed by Nancy Rumbel and John Kessler.
Producer: John Kessler
Govt Producer: Sallie Bodie
© 2017 Tune In to Nature.org   June 2017/2019/2022   Narrator: Michael Stein

ID#              NOGA-03-2017-06-05    NOGA-03

Sources: file:///C:/Customers/Proprietor/Downloads/271528percent20(3).pdf
http://animaldiversity.org/accounts/Morus_bassanus/

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