2 Black Swan feed Koi fish
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6. Judge-Jake commented 10 years ago
#4 Absolutely Wrong! A friend of mine runs a koi farm in Indonesia and employs a flock of Black mute swans to feed the one's in the middle of the lake. The black Swan is known for it's fish feeding skills all over the world. The cormorant (a relative of the black swan) is used by Indonesian fishermen to feed fish on wild rivers (you may have seen them on adverts)Unfortunately the method adopted by the Cormorant involves the bird bringing the fish back to the boat for the fishermen to feed, at which stage the fisherman simply keep the fish.
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8. MindTrick commented 10 years ago
#5 "Common sense" is used to express things that most people know on a regular daily basis in the society they grow up, not that ducks shake the food in water to rinse it off. That there was a explanation other than the title insinuated should be of course taken in consideration, and it would be reasonable to search for that alternative. But i would not call it common sense to know that ducks shake food in water like that and that the fish around come and eat the waste on a daily basis.
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10. bytebuster commented 10 years ago
Are there any movies of white swans doing this?
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11. Urmensch commented 10 years ago
Gaping mouths of baby birds trigger a feeding instinct in parents.
The gaping mouths of the fish trigger this same instinct and the swans react, putting food into their mouths.
The fish will have become used to being fed on the surface and won't care who does the feeding, the humans or the swans.
The gaping mouths of the fish trigger this same instinct and the swans react, putting food into their mouths.
The fish will have become used to being fed on the surface and won't care who does the feeding, the humans or the swans.
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14. Urmensch commented 10 years ago
The suggestion that the swans are enjoying feeding the fish is not as preposterous as it might seem.
We know that birds and animals have reward circuits in their brains, so when they follow through and respond to stimuli they are 'rewarded' by these circuits in their brains.
Lacking the cognitive ability to know that without feeding them their young will die, evolution solves that problem with instincts triggered by gaping mouths, and rewarding the fulfilling of that desire by stimulating the pleasure centres in the brain of the parents. Without this reward system the parents wouldn't go through the hardships involved in bring up their young.
Humans are activating these same pleasure centres, which evolved for the same reasons in us, by eating foods and use of drugs.
We know that birds and animals have reward circuits in their brains, so when they follow through and respond to stimuli they are 'rewarded' by these circuits in their brains.
Lacking the cognitive ability to know that without feeding them their young will die, evolution solves that problem with instincts triggered by gaping mouths, and rewarding the fulfilling of that desire by stimulating the pleasure centres in the brain of the parents. Without this reward system the parents wouldn't go through the hardships involved in bring up their young.
Humans are activating these same pleasure centres, which evolved for the same reasons in us, by eating foods and use of drugs.
-8 1. chefnaj commented 10 years ago