The suspect was found with a .22-caliber rifle, a machete and a dog that reportedly was used for hunting. He was arrested for carrying a weapon illegally. Three others with him fled.
Rescuers found beagles, Chihuahuas and American Staffordshire Terriers during the raid, along with 39 birds.
A Cartago court sentenced a man for illegally breeding dogs in a puppy mill. Most of the dogs were kept inside stacked cages or hanging crates for years.
A ranger lost two fingers on his right hand while trying to protect himself from a machete-wielding hunter.
Thousands of parrots, monkeys, iguanas, toucans, turtles and other rain forest animals are kept as exotic pets in Costa Rica, a practice putting some species at risk, according to experts.
A photograph of a dead jaguar posted on a Costa Rican youth's Facebook profile on Tuesday has caused outrage among Ticos on social media sites.
A bill in the Legislative Assembly also would prohibit feeding wild animals and using artificial or visual means to attract them.