Birders in the U.S. are supposed to hate European Starlings (Sturnus vulgaris), and there are plenty of reasons to do so.
The species originated in Europe, North Africa, and western-to-central Asia. While mostly abundant there as well, the species has been red-listed in England after populations plummeted by more than 80% over the last 40 years . Other northern European countries have witnessed a similar decline . We can only wish that would happen here.
North American populations have exploded since their introduction in the early 1890s. According to the USDA, starlings cost our country $1.5 million in damage to agricultural crops, the consumption of feed intended for livestock, and in property damage. In one winter, a million starlings can down 27,500 tons of livestock feed, not to mention what is ruined by their accumulated droppings—and latest estimates put the US population at over 200 million birds.