Small insects more commonly known as fruit flies.
The word is from the
dutch word 'Biervliegje' wich is commonly used by the
dutch to describe the insects who have a taste for
alcoholic beverages,especially fruit flies.
Fruit flies have a taste for rotting fruit and in nature the smell of
alcohol is like hitting the jackpot for creatures who
live of rotting fruits.
The beerfly is any flying insect that can and will land in your
fresh pint.
But most of all they will do it over and over again if given the chance!