Like bees, they are able to assess the amount of sugar in the nectar they eat; they normally reject flower types that produce nectar that is less than 10% sugar and prefer those whose sugar content is higher.
Igual que as abellas, poden estimar a cantidade de azucre no néctar que comen; normalmente rexeitan os tipos de flores que producen néctar que ten menos do 10% do azucre e prefiren as que teñen un contido maior.