8. Grassland Birds
The grasslands are the areas of the country that have been the most altered by human interference. Of all the types of birds that have been lost in the past few decades, grassland birds have been hit the hardest. Across 31 distinct species, more than 700 million birds have disappeared. That’s a 53 percent drop in the grassland bird population.
Those little brown birds that are commonly seen flying through your yard are American sparrows. This bird’s population has dwindled considerably. Almost one-quarter of the American sparrow population has been lost since the 1970s. That’s over 750 million birds!