🚀 go-pugleaf

I recently read that the total mass of all termites in the world is 10 times
that of all humans.  In another news item, I read that there is one cow for
every four people in the world, and that cows have a significant effect
on atmospheric pollution.  These two bits of trivia prompted me to wonder
about the total number, and total mass, of various different species and
other kinds of animals.  Specifically, I would like to know various entries
in a table of the following form:

Animal   Population   Average mass   Total mass
humans   5x10^9       100lbs         5x10^11lbs
cattle   1x10^9?      ?              ?
rabbits  ?            ?              ?
deer     ?            ?              ?
sheep    ?            ?              ?
ants     ?            ?              ?
termites ?            ?              5x10^12lbs?

The table is a little ad hoc, since some of the entries are just one species
and others are a huge number of species.  But what I'm basically after is
a rough feel for which animals are the most prevalent on Earth.  Does
anyone know any of the figures for the animals listed above or for other
animals?

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---
Greg