Yes, there is a small colony of so called "vampire bats " in South America that leach blood from cattle, but a similar species in the southwest desert of the United States is pivotal in keeping the cactus plants pollinated by feeding on the nectar.
(the cactus plants; pollinated; ) (so called "vampire bats " in South America; leach; blood) (a similar species in the southwest desert of the United States; is; pivotal in keeping the cactus plants pollinated by feeding on the nectar)
the cactus plants so called "vampire bats " in South America a similar species in the southwest desert of the United States
pollinated leach is
blood
pivotal in keeping the cactus plants pollinated by feeding on the nectar