Cormorants can really cause some damage.
In urban areas, regular firearms might have too much range to take these pest birds out safely.
Witness an air rifle take out invasive cormorants with great success.
When cormorants decide to pay your locale a visit, you are in for some serious trouble. They feast on all the fish in the area and leave a strewn mess of feces all over the countryside among many other problems.
Where urban areas exclude the use of firearms, a high powered air rifle is quite lethal in the hands of an expert shot. This Benjamin Marauder air rifle is put to use making excellent head shots on these pest birds.