[["Around 2009, two scientists decided to estimate the total number of birds on the planet. The number they came up with was 200 to 400 billion individual birds. ", 167.0], ["This is difficult to answer as the global bird populations constantly fluctuate. In 1997 a paper published in Biodiversity & Conservation journal estimated the global bird population was between 200 and 400 billion. The observed numbers of many individual taxa have changed significantly since then.", 66.0]]
how many birds are there in the whole world
animals,birds,parakeets