Predators, diseases and other natural forms of population control in many areas where burros have been introduced have been inadequate to control these population increases.
(burros; have been introduced; L:many areas) (Predators, diseases and other natural forms of population control in many areas; have been; inadequate to control these population increases) (Predators, diseases and other natural forms of population control in many areas; to control; these population increases)
burros Predators, diseases and other natural forms of population control in many areas Predators, diseases and other natural forms of population control in many areas
have been introduced have been to control
L:many areas
inadequate to control these population increases
these population increases