More plentiful than what? There are an estimated 200-400 billion birds in the world, with 10-20 billion in (for example) the US alone. Or did you mean something

More plentiful than what? There are an estimated 200-400 billion birds in the world, with 10-20 billion in (for example) the US alone. Or did you mean something else? How many birds: http://www.motherjones.com/kevin-drum/2011/03/how-many-birds http://www.motherjones.com/kevin-drum/2011/03/how-many-birds