Have you ever wondered how birds manage to live and grow Chicks in the dense foliage of tall trees? Most of them, like people, distinguish between red, green and blue colors, but in their vision there is one feature that allows them to easily navigate the vegetation. To show how the birds perceive their main habitat, Professor of the University of Lund Dan-Eric Nilsson armed with a special camera and took a very interesting photo.
Vision of birds
It shows the main feature of the visual perception of birds-unlike people, in addition to colors, they distinguish the ultraviolet spectrum of light. The photo shows that due to the additional spectrum of birds see a more contrasting picture: the leaves in the foreground seem light, and in the background — darker. Thanks to this, birds create a more three-dimensional image, which allows them to easily navigate on the tops of trees.
To take such a photo, the Professor and his assistants used a multispectral camera with a number of optical filters. They are mounted on a special wheel, rotating around the lens — so you can simulate the vision system of different animals. The authors of the study used four filters simulating photoreceptors found in the retina of some birds.
According to Professor Nilsson, people and animals seem to live in different realities. People often see a flat picture, while animals are able to look much deeper. Devices such as a multispectral camera with lenses can tell a lot about the animal world.