The city says Staten Island’s deer population is on the decline. Photo by Steve Hillebrand, USFWS.

The city says Staten Island’s deer vasectomy program is working and has resulted in an 8 percent drop in the borough’s deer population.

Year two of the program ended in March, with contractors performing a total of 1,154 vasectomies. The Parks Department says the overall deer population has dropped from 2,053 deer in 2017 to 1,884 this year. Births are also down more than 50 percent.

Last week, Mayor Bill de Blasio stood behind the vasectomy program despite its rising costs, calling it both smart and humane.