The rarest color of budgerigar is blue. In the wild, blue budgerigar is rare, even very rare. This is because blue is a recessive gene, and only when both parents have this gene can blue offspring be produced.
In the pet market, the blue budgerigar is very popular and the price is relatively high. This is also because its rarity makes it a collection.
It should be noted that budgerigar is a pet bird with high IQ and rich emotions, which needs constant companionship and interaction to avoid boring and uncontrollable behavior problems. If you are considering adopting budgerigar, you must provide a good living environment and careful care and training.