From Your Cat To The Butterfly In A Park, Find Out How Differently They See You

Human vs dog/cat

Human vs dog/cat

It's all about receptors in the end.
Humans have three types of receptors in eyes, which help them to see all kinds of colours by combining the Red, Blue, and Green colour.
On the other hand, dogs and cats have only two receptors (blue and yellow) which make them colour blind when compared to a human eye.

Human vs bird

Human vs bird

It is different with birds, though.
While humans have three receptors, birds have four.
The fourth one enables them to view an ultraviolet spectrum which makes them a tetrachromat.

Human vs rattlesnake

Human vs rattlesnake

A rattlesnake can see few colours but it has the ability to see infrared.
The sensors are located on their heads.
These creatures merge the information gained from the infrared with what they see.
After this, they make a thermal image of the prey.
What a snake sees, can be seen by you if you see through an infrared camera.

Human vs cephlapod

Human vs cephlapod

The cephalopod includes creatures like octopus, squid, nautilus, etc.
which have evolved from vertebrates.
They are totally colour blind.
They have three photoreceptors.
One enables them to see some shades of gray.
The other two receptors help them to detect polarisation which human eyes can't.
By nature, they have the ability to avoid ultraviolet rays.
Humans have to wear sunglasses to reduce UV impact.

Human vs bees

Human vs bees

Bees have only two receptors, blue and green.
They have the ability to see UV light patterns.
Bees feed on the nectar (a sugary fluid secreted by flowers) of flowers and with the ability to see UV light; it becomes easier for them to spot patterns of nectar on a flower.

Human vs scarab beetle

Human vs scarab beetle

These organisms reflect a circular polarised light off their back which the humans are unable to see.
Scientists believe that they reflect this particular kind of light to communicate.

Human vs bats

Human vs bats

Studies have shown that bats can see a polarised light.
Primarily, they just use echolocation to navigate through and to capture their prey.
Well, for us we certainly can see all the colours but bats have the advantage of echolocation.
Echolocation is the use of sound waves and echoes to determine the location of objects in space.

Human vs butterfly

Human vs butterfly

In addition to being able to see red, blue, and green; butterflies can see UV and the wideband light ranging from red to purple.
Still, they have only 0.04 vision when compared to humans which can't let them see a coin put at a distance of 50 centimetres.

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