How many animals have died because of urban developement?

The number of animals that have died because of urban development is difficult to determine, as there is no comprehensive data available on the subject. However, several studies have provided estimates of the impact of urban development on wildlife populations.

For example, a study published in the journal "Conservation Biology" estimated that in the United States, at least 1.5 million birds are killed each year as a result of collisions with buildings. Another study, published in the journal "Ecological Applications," estimated that the expansion of urban areas in the San Francisco Bay Area has resulted in the loss of habitat for over 1,000 species of plants and animals.

While these studies provide some insights into the impact of urban development on wildlife, it is important to note that they only provide a partial picture of the problem. Many other factors, such as habitat fragmentation, pollution, and climate change, also contribute to the decline of wildlife populations in urban areas.