The Focus forum is now closed.
We're sad to make this announcement because, over the years, the forum has provided fascinating debate on science and technology, and we’ve often printed the discussions in the magazine.
We’d like to thank everyone who’s joined in and made it such interesting reading for fellow forum members and all of us who work on the magazine.
Graham Southorn, BBC Focus magazine
Are owls the only bird that can see the colour blue?
Answer : This ludicrous myth was spread via an email chain letter, notorious for misinformation & general silliness. The idea behind most of them is to see how many of your friends are guillible enough to forward them without checking to see if they are true, then having a good laugh.
Not only can birds see blue but some varieties of birds can see into the UV spectrum, allowing them to detect colors that humans cannot perceive.
Owls are nocturnal and have poorer color vision than their diurnal counterparts like harks or eagles.
The reason bluebirds, blue jays, blue herons, blue parrots & all sorts of other blue-plumaged birds attract mates with their blue feathers is because birds CAN see blue. http://wiki.answers.com/Q/Are_owls_the_only_bird_that_can_see_the_colour_blue
Yes. Birds have highly developed vision and can perceive colours.
Birds have an elaborate variety of cones cells, with more morphological complexity and diversity than those of mammals.
The structure of the bird retina is also more complex than humans'. Multiple foveae and other specialized regions that are suggested by non-uniform distributions of oil droplets (such as the red quadrant of the pigeon's retina) indicate a degree of complexity that is not present in the human eye and for which our own sensory experience provides little intuitive understanding. Birds may have a generalized system of color vision, but individual species may also have features of their eyes adapted to specific visual tasks or conditions, and attention to this ecological dimension in formulating hypotheses about visual function is likely to be critical.
Read more: Do birds see in color? | Answerbag http://www.answerbag.com/q_view/37303#ixzz0vZ7eAmqH
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