An average human will find it difficult to chew red chilli pepper due to heating or burning of tongue. But parrots eat chillies normally like other food stuff ;and what is more they are particularly fond of red chillies i,.e the hotter ones ?
Any scientific reason ?
Birds can't taste the capsaicin that makes chilies hot. The pepper plants originally developed this as a natural defense against mammals that might eat them, because the chili pepper seeds would not survive a trip through the mammalian digestive tract, but they can apparently survive a bird's. It's just another yummy fruit to them.
The parrots may favor the red chilies because they are more eye-catching than other colored peppers, the red color can also indicate ripeness, and ripe fruit has a higher sugar content (sweeter) than unripe fruit.