Modulous notes:
as for population size: we're up there with the best of them - but I think some of our domesticated species (esp sheep) probably outnumber us as well as small non insect animals such as plankton and maybe even some rodents outnumber us
According to
How many sheep are in the world? - Answers,
there are approximately 1,202,920,000, well below the human population. BUT!!!!
The chickens! My god, the chickens! How many are killed and eaten each day around the globe? How many per second!!!
In all seriousness, a general rule of thumb is that the smaller lifeform you are, the more numbers of you there are. There are something short of 7 billion humans, call it roughly 10^9th. Just a quick google tells me that there are something like 10^10th-10^12th bacteria in 1 gram of your typical human colon tract alone.
See
http://www.vivo.colostate.edu/...gestion/basics/gi_bugs.html
But IIRC bacteria are off topic....
According to
http://www.assistamerica.com/press_avianflu.html, in 2006 there were 35 billion chickens, an average of 5+ for every human being.
This, however, is also Off Topic
- xongsmith, 5.7d