Recent scientific research has revealed an amazing world of vision diversity across the animal kingdom. According to the research birds are tetrachromats, they see four colors: UV, blue, green and red, whereas humans are trichromats and can only see three colors: blue, green, red.
The study mentioned that birds are inexplicable creatures, for example, penguins can only recognize salty and sour tastes. And Palila birds, native to Hawaii, feed on the seeds of the māmane plant, which contain a level of toxins that would easily kill any other small animal.
Joe Smith, an ornithologist, explains that birds have the amazing ability to see a whole spectrum of colors that are invisible to us, people. Back in 2007, scientists, with the help of a spectrophotometer, analyzed the colors of 166 North American songbird species which did not have an apparent physical difference between the sexes.
From a human’s perspective, in 92 percent of species, both males and females look identical. However, the study showed that these birds have colors that are simply undetectable by our eye that they differentiate their genders by.
For example, the male Yellow-breasted Chat has a yellow breast (pretty obvious), but its potential mates or rivals also see ultraviolet feathers on his chest that set him apart from the females of the species.
The theory was again proven in another study in which scientists placed taxidermied male and female Chats in the wild to see how their living counterparts would react. Males stayed true to their territorial nature and attacked the stuffed male Chats and tried winning over the taxidermied females. Thus, they obviously were seeing something that the researchers couldn’t.
The research also revealed many remarkable facts like, dragonfly’s brain works so fast that it sees movements in slow motion, snakes pick up infrared heat signals from warm objects, thus detecting their prey, whereas horses and zebras have eyes pointed sideways, enabling them to have peripheral vision and escape danger when necessary.
Insects use compound eyes that are made of thousands of tiny lenses that look like a honeycomb pattern. Pigeons are thought to be best at color detection than any animal on Earth and are often used in search and rescue missions. Various avians have different superpowers and different ways of working their sensations.
Therefore, it comes as no surprise that animals are diverse in their vision.