blue gray
None
Their blue color stands out from other birds.
Blue Jays are attracted to the color blue. All birds are attracted to most bright colors, but certain birds are attracted to certain colors.
Birds that you see around in the daytime have phenomenal color vision. Birds see color not only better than humans, but they see color in such a superior way that we humans cannot even begin to understand it. Pretty much all daytime birds can see blue perfectly. Nighttime birds, like owls, are most likely colorblind, though.
The blood of birds and other animals is red.
Owls are the only birds that can see the color blue.
The most attractive color for a bird feeder is red. This color is known to attract birds, especially hummingbirds, due to its similarity to certain types of flowers that birds feed on. Yellow and blue can also attract birds, but red tends to be the most effective color choice.
i am pretty sure robin eggs r blue
yes they can see all colors
all birds are unable to see the colour blue... except the owl! :P
Most mammals are believed to see blue color, including dogs and cats. Additionally, some birds, such as owls and hawks, are thought to have limited color vision and may perceive blue.
Depends on the bird. Blue, white, brown, speckled, all colors.