animal sight
Post on 09-Jun-2015
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How Animals Perceive The World
By: Stacy Bustamante
Bumble Bee
The visual receptor cells of bees allow them to
transduce ultraviolet light better than we can with our normal visual receptor cells.
The bees have compound eyes; hundreds of single eyes (called ommatidia)
arranged next to each other, each with its own lens and each looking in a different
direction.
Bumble BeeVision
Dog
Dogs only see very pale shades of color, and many have
vision that is comparable to a human who is red-green
color blind, which means they can't tell the difference between red and green. However, they do have
better peripheral and night vision than us, with eyes
that are much more sensitive to movement.
DogVision
Squirrel
Though humans can see the entire visible light spectrum
and would be able to appreciate the rich greens of the grass, squirrels are red and green color blind, and
only perceive the blues, yellows, and greys of the
landscape.
SquirrelVision
Sea Turtle
Sea Turtles have a special feature which perhaps
evolved to help them see on the dark sea floor; their
individual photoreceptors contain red oil droplets which
obstruct shorter light wavelengths. As a result,
they can easily pick up reds and oranges and yellows, but cannot really perceive any of the longer light wavelengths
such as green or blue or violet.
Sea TurtleVision
Snake
Snakes will use their normal eyes during the day, but at night it will change over to its
other pair of "eyes". These pit organs can pick up infrared heat signals from warm objects in their surroundings. During the
day, a snake's vision is very dependent on movement.
SnakeVision
Shrimp
Shrimp have the least developed vision on our list. They have compound eyes similar to an
insect, but give much less detail. Luckily, shrimps are
very good at picking up signals from sudden movements in their
surroundings. This is one of their best defences against
predators
ShrimpVision
Bird
Daytime birds see a greater range of colors than humans, including
ultraviolet light. As humans, we have never actually seen many of these
colors, so a bird's actual vision would be very difficult (if not impossible) to
emulate here. It is generally accepted that color is much more
vibrant in a typical bird's vision than it is in humans. Hunting birds such as
the eagle, kestrel and vulture are know to have outstanding binocular vision, enabling them to easily spot prey from thousands of feet away.
BirdVision
The End
(Applause, please =) )
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