Far, far more than millions of chicken. According to this NY Times article 23 billion alive at any one time. [1] The most numerous bird species in the world.

Far, far more than millions of chicken. According to this NY Times article 23 billion alive at any one time. [1] The most numerous bird species in the world. [1] https://www.nytimes.com/2018/12/11/science/chicken-anthropocene-archaeology.html https://www.nytimes.com/2018/12/11/science/chicken-anthropoc...