From the Queens Courier:
Pigeons are common in the city, but they remain nuisances for many Queens residents who walk under elevated train tracks like the No. 7 line.
The New York City Transit Authority has been trying to do something about it. At numerous stations along the No. 7 line, NYC Transit has installed four different repellants to try to keep the pigeons from congregating in the stations.
The 103rd Street-Corona Plaza and 52nd Street stops are equipped with the “Bird B Gone” shock track. According to Charles F. Seaton, a spokesperson for New York City Transit, the cost of the installation of the track shocks at 103rd Street was $102,550 and 52nd Street was $154,750. However, he said NYC Transit does not monitor the electricity usage.
Another station is the 74th Street-Broadway stop, which has two systems in place to disperse pigeons, Seaton said. They are the “Avian” system, which operates the same way the shock track does, but has proved to be less effective, and the “Bird B Gone” gel repellant, which is applied to ledges and perches within the station confines.
The Mets-Willets Point stop has a “Bird Call” system installed in the mezzanine, which mimics the sounds of predators and keeps the pigeons away. The 111th Street stop has metal spikes installed above stairs and walkways to prevent roosting.