A decline in bird populations in an area is the first indication that something is amiss, according to an expert from a wildlife organization.

“Birds are the first stimulus of degradation in an area. If there is a decrease in the bird populations somewhere, it indicates that something is wrong there,” Ahmet Emre Kutukcu, a wildlife expert from World Wildlife Fund (WWF) Turkey, told Anadolu Agency.

Citing the relationship between bird populations and the balance of nature as an example, he said that once in Europe, birds that were feeding on farmlands decreased because of a pesticides-related reduction

Read more: Decline of bird population first warning of 'breakdown'