The brains of some intelligent animals have the ability for abstract thought. They can differentiate between likeness and contrast. Yet this is a rarity among animal species.
However, the cutest of adorable little ducklings have been found to possess this ability in scads. They may have been thought to be nothing but a “bird brain” species up until now, yet that is hardly the case. Newly-hatched ducklings can differentiate between sameness and variation in a matter of seconds.
The really strange thing is that the ducklings have this power without any previous training. They seem to instinctually possess the power to differentiate between the same and the different.
Read more details on I4U News.