We grow chilis on our farm and discovered recently that birds were eating our red chilis. Surprised, we did some research and discovered that birds seem to be immune to the burning sensation of chilis. Some scientists say birds have so few taste buds that they cannot taste capsaicin, the ‘hot’ chemical in chilis.
And because birds love to eat chilis, they are the main dispersers of chili seeds. So it looks like chili plants got very smart – to spread their seeds far, they made their fruits taste okay for birds and very painful for mammals like rats, cows, and humans.