Crows are found in large numbers across India. According to researchers, Crows can recognise individual human faces, especially those who have treated them badly. And they can hold a grudge for years against such people!
Crows carefully monitor the humans with whom they share living spaces. When they are treated badly, they inform their mates of their grudge against a particular person. Together, the crows then plan an attack by usually dive-bombing (flying together in speed) at the said person.
However, according to researchers, such attacks are a rare sight in cities or towns. This usually happens to crows that are kept in captivity.
Humans grow hair, nails due to the presence of keratin in our body. But one thing that we can’t grow is a pair of eyes! However, land snails unlike us, re-grow their eyes, if damaged.
Most land snails have eyes on the ends of their two upper long tentacles. The head has one to two pairs of tentacles which have the eyes at the tips. These tentacles can regrow if severely damaged and if a snail’s eye is cut off, the antennae can regrow a new eye when the antennae grows.
Snails don’t have a clear vision, but can detect changes in big and light objects. If you place a finger in front of the snail’s eyes, it can sense it and will instantly retract or draw back its eye into the tentacle to protect itself.
The Giant African land snail is known to eat more than 500 different types of plants.