1. Watch the video above, and then answer these questions.

     

    What are some predators of the cane toad in Australia?

    • Answer

      The cane toad has almost no predators in Australia. The toads are poisonous to almost all potential predators—even the saltwater crocodile. Human beings are the most powerful and effective predator of cane toads in Australia!

      In the cane toad's native habitat of Central and South America, it has many natural predators. Caimans (a relative of the crocodile), snakes, birds, and even fish prey on the cane toad.

  2. Cane toads excrete a toxic substance that makes their skin poisonous. Where are the glands that excrete this poison?

    • Answer

      The poison is spread from glands on the cane toad's shoulders.

  3. What do cane toads eat?

    • Answer

      "Anything that fits in their mouth!" according to one biologist.

      The toads do not limit their diet to living things. According to another naturalist, cane toads will even eat marbles and golf balls!

  4. Cane toads are not native to Australia. Why were they introduced?

    • Answer

      Cane toads were introduced as a pest-control device. Farmers hoped the amphibians would eat insects that damaged sugar-cane crops.

  5. Did the introduction work?

    • Answer

      No! According to the video, the "toads ate everything except the insects they were brought in to kill!"

amphibian
Noun

an animal able to live both on land and in water.

cane toad
Noun

animal (amphibian) native to the Americas and considered an invasive species in Oceania and islands of the Caribbean.

crocodile
Noun

reptile native to parts of Africa, Asia, and the Americas.

Noun

agricultural produce.

excrete
Verb

to discharge a substance from the body.

farmer
Noun

person who cultivates land and raises crops.

gland
Noun

group of cells that secretes a chemical useful for the body to function.

insect
Noun

type of animal that breathes air and has a body divided into three segments, with six legs and usually wings.

naturalist
Noun

person who studies the natural history or natural development of organisms and the environment.

pest control
Noun

process of removing unwanted species (pests) from a specific geographic area.

poison
Noun

substance that harms health.

predator
Noun

animal that hunts other animals for food.

sugar cane
Noun

tall grass that is harvested to extract sugar from its sap or juice.

toxic
Adjective

poisonous.