* Data is not universally collected: There isn't a global system for tracking animal deaths, especially for pets.
* Causes vary: Animal deaths can occur due to natural causes (old age, illness), accidents, euthanasia, and other factors.
* Numbers fluctuate: The number of deaths would vary greatly depending on factors like population size, location, and time of year.
If you are interested in learning more about specific causes of animal deaths, you could research animal shelters, veterinary statistics, or animal welfare organizations.