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In this video:
While there are many birds that have naturally evolved to be flightless, there’s only one kind of bird humans have selectively bred until it no longer possesses an ability shared by most of its kin- the parlor roller.
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Sources:
www.ufaw.org.uk/birds/pigeons...
academic.oup.com/jhered/artic...
www.farmshow.com/a_article.ph...
barnhartlofts.com/parlors.htm
• Video
• Parlor Roller Competition
en.wikipedia.org/wiki/Rock_dove
www.roysfarm.com/parlor-roller...
• Video
• Parlor Roller Demo Ree...
www.pigeons.biz/forums/f101/pa...
en.wikipedia.org/wiki/File:Pa...
Image Credit:
en.wikipedia.org/wiki/Flightl...
upload.wikimedia.org/wikipedi...
en.wikipedia.org/wiki/Parlor_...
en.wikipedia.org/wiki/Tumbler...
www.flickr.com/photos/jimgiff...
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