According to PBS it is the Finch
Australian sparrow
The farmer had a prolific season this year. Sally was the most prolific contributor to her community. He knew that being prolific was a good thing.
Probably seagulls.
The 2nd largest bird on earth is the harpy eagle .
Arvind Gaur of Asmita Theatre is known as Most prolific theatre director of Delhi.
Mandarin Chinese is the most widely spoken language in the world, with over a billion native speakers.
A supercell is the most powerful variety of thunderstorm on earth. They are the most prolific produces of severe weather. Supercells are the primary produces of very large hail and strong tornadoes.
do you mean what is the commonest bird on earth? The answer to that question is most likely the pigeon
England
In the crust, Aluminum. However, the only economically viable form for mining is Aluminium-Bauxite which is not prolific, hence the higher cost of Aluminium.
We the People
The most prolific species is the tapeworm.In every segment there are bunches of testes+ovaries-so an individual adult can finish up with 100s of gonads.