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| Naww best friends, so cute. |
Budgerigars (parakeet, shell parakeet) in their
natural-habitats of Australia are noticeably smaller
than those in captivity. This particular parrot
species has been bred in many other colours and
shades in captivity (i.e. blue, grey, greygreen,
pieds, violet, white, yellow...) although they are
mostly found in pet stores in blue, green and yellow.
Budgerigar plumage is known to fluoresce under ultraviolet
light (as most other parrot species do as well),
a phenomenon possibly related to courtship and mate
selection.
Like many birds, budgerigars have tetrachromatic
colour vision, but all four classes of cone cells
operating simultaneously requires the full spectrum
provided by sunlight. Additionally, budgerigars
have been known to see in the ultra-violet spectrum,
which brightens up their feathers to attract mates.
The throat-spots in budgerigars have been most notable
for reflecting UVs and for identifying one bird
from the other... |
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