原鴿是世界許多城市都面臨的一個問題。一些科學家正在嘗試對原鴿進行節育以減少其數量，但這可能不算有效，因為原鴿需要服用藥物數天才能停止生育。可惜人類餵飼是原鴿的主要食物來源，牠們的食物選擇有很多而不一定會連續食用科學家的藥物。研究發現，減少原鴿的食物資源是減少牠們數量更有效的方法，然而人類的行為很難管制。

Feral pigeons is a problem in many cities around the world. some scientists are trying to give birth control to the pigeons to reduce their population, but it might not be effective because the birds need to consume the drug for days in order to stop their fertility. However, pigeons have many available food and human feeding is one of their main food sources. Study found reducing pigeon food resources is the more effective way to reduce their numbers, but human behavior is difficult to manage.

https://www.audubon.org/magazine/cities-are-testing-birth-control-solve-pigeon-problems