2. Both Transmit Diseases
Both insects can transmit disease and cause other health issues. Fleas are known for transmitting bartonellosis and tapeworms. They are also known for causing anemia. Ticks on the other hand can transmit more serious diseases like Lyme disease and Rocky Mountain spotted fever, a bacterial disease that can be deadly.
The typical hosts of a flea are dogs, cats, possums, coyotes, racoons and foxes. Ticks on the other hand like to set up camp on a lot more animals, including birds, rodents, snakes, lizards, foxes, deer, squirrels, possums, raccoons, cattle, cats, dogs, and even humans!