Which animal species' on Earth have populations that most equal the human population?

Small insects, marine animals, and bacteria would outnumber humans.

edit:
@"and which animals have a total population that is closest to the total number of Homo Sapiens."
@"I didn't ask which animals outnumber humans"

Let me rephrase:
Small insects, marine animals, and bacteria are examples of animals that have a total population that is close to humans, or greater, as opposed to animals like horses that are nowhere near the human population.

Other animals that live along side us like dogs cats rodents like mice and rats cattle

Hmm, nice question ! ...one that I don't have a definite answer for....one that comes to mind is the red-billed quelea - there are about 1.5 billion breeding individuals (adults), but given that 2 - 4 eggs are laid at a time, it could loosely be said that in total there are something like 4.5 - 7.5 billion individuals within the species as a whole - the average of this range approximates the total human population. I cannot think of a more specific population count of a species that more closely answers your question (doubtless there is though)....

J. Spicoli - I see you cannot do any of the following - discern the question asked, be specific in what you present, stick to talking about animals !

Lord Chuc - cats and dogs are much lower in number, rats and mice far exceed, domestic cattle are much lower in number...