Why Sparrows Are Decreasing?

"In Europe, a lack of urban green space and nesting sites are threats. It's likely some of those same factors are at work in North America and contribute to House Sparrow declines here.”

Why the sparrows are disappearing?

The reasons for the decline of the sparrow population are loss of habitat due to rapid urbanisation, diminishing ecological resources for sustenance, high levels of pollution and emissions from microwave towers.

What is the reason for the decline of the number of house sparrows?

Population of house sparrow is fast declining due to danger posed to their survival by a host of factors, such as, lack of nesting sites due to modern architecture of building, lack of seed food, insect food and proliferation of cell phone towers.