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Examples for explaining bird’s sexual selection by Demand-raising-beauty Theory (2 Viewers)

Andy Hurley said:
Is it? has this been scientificallly proven? Or is this just some random statement to back your theory?
The picture you show does not have, with any sense of the imagination a fish displayed on its head. But this holds true for most of your claims.
Click to expand...

The tittle shows the theory or hypothesis. The photos or examples are evidences. The evidences that some people ask for actually are the evidences of evidences, or the evidences of those resemblances. I have to say sorry. I think it is infeasible and also unnecessary. You have freedom to believe or not.

If with my theory, common people can forecast birds' habits better according to birds' appearances, or my theory can help common people understand birds
colorful plumage better, the theory must provide information and hence is scientific.

Please have a look at this review by the Journal Science: Male Guppies Imitate Food and Get Sex.
[url]http://news.sciencemag.org/2002/02/male-guppies-imitate-food-and-get-sex[/URL]

Do you think this resemblance between the orange spots and the food is better than that between a prawn's back and a tufted puffin's upper beak? or that between a butterfly and a sunbittern, or that between Beikal Teal's face and alluvions in a river?

Please be fair!
 
morninglight said:
The Mallard and many species of duck have plumage that dispalys the enviroments they like to live.
The following is a free image from http://www.stockfreeimages.com
Click to expand...

That would mean camouflage then? And here is me thinking that they are colourful to attract a mate, to show their fitness and not for any percieved sense of beauty placed on them by man.
The Mallard's head colour is light dependent. I've seen purple, blue and green. It does not mean that it lives on heather, water and grass. Or any other combination I choose to imagine.

... Maybe Chris is right...better to ignore as I am not convinced by you theories. But then how can I be, I'm only common.
 
 
Male Blackbirds feed at night by the light of glow worms, hence they are black with a yellow bill.

See its easy!
 
Andy Hurley said:
That would mean camouflage then? And here is me thinking that they are colourful to attract a mate, to show their fitness and not for any percieved sense of beauty placed on them by man.
The Mallard's head colour is light dependent. I've seen purple, blue and green. It does not mean that it lives on heather, water and grass. Or any other combination I choose to imagine.

... Maybe Chris is right...better to ignore as I am not convinced by you theories. But then how can I be, I'm only common.
Click to expand...

If the male and the famle look very different, we cannot explain the male appearance by camouflage.
I do not want to persuaid every one, ecpecially one like Chris who made mind to oppose from very beginning no matter how many and how good evidences came.
 
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If there are only 1-5 examples, we may consdier that is because of coincidence.
Now there are tens examples that can be explained by foods or environments. Can you expain them by other theories so easily?
 
More birds display water plants.

The Glossy Ibis and the White-faced Ibis have dark green plumage on back that mimics water plants or watr color.
If the female also has the same color or pattern, we can consider they are for both camouflage or/and beauty.
But it is also possible that the male appearance pass to both sons and daughters.
If one color or pattern has two kinds of uses, that means lower cost for each use.

See the Glossy Ibis here:
http://www.flickr.com/photos/64565252@N00/3906951690/in/photolist-6Xf9C3-8mWXRA-e7joZQ-e7joY3-efGcZu-cWQyAS-cWQhwS-cWQzDo-cWQewW-cWQgVw-cWQA1s-cWQz53-cWQy7N-gV2stM-gV2sB2-bugTkP-bB1XN7-bPVAZR-bPVB46-9KhdHp-8skhoB-8skhd6-e9Xsp4-8fEBG9-9vnabB-8skhmn-8skhkc-8skhnr-eaAAeU-eaAA9d-eaAAay-eauW3B-eauW6g-eaAA9y-eaAA8d-eauVYn-eaAA7w-eaAAa3-eauVWD-eauW22-eauW64-eaAAbC-eauVXn-eaAAcJ-eauVZv-eaAAdm-eaAAc1-eaAA7q-eauW6R-eauVW4-eaAA5A
 
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The Torrent duck displays the torrent from melted snow it likes.
How do you explain this by other theories?

The following image is from Wikimedia Commons, the free media repository.
Thanks to the author John Gerrard Keulemans.
 

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Can you predict birds' habits, i.e. favorite foods and enviroments by their appearances according other theories? At least, according my theory, we can predict most birds' habits, especially birds with colorful plumange.

What is scientific theory? It is a theory, said by Popper, that can predict facts and hence provides information and can be tested.
 
There are many birds only with two colors that mimic sea and sea shore, including Sea Gull,
Common Merganser, Common Murre. This taste for beauty of birds will help them to stay in proper place.
 
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