• Giant orcas (killer whales) are going missing along the California coast. Wild Chronicles sets out to find the culprit before it's too late.

    1. There are two populations of orcas in Canada's Pacific Northwest, permanent residents and "transients," or migratory animals who are just passing through. What is the difference in diet between the two populations?

      Permanent residents mostly eat fish, while transients prey on marine mammals such as seals.

    2. Why doesn't Nancy, the biologist, recognize the pod of orcas in Monterey Bay?

      The whales are not the regular transient pod that Nancy expects. The new pod is a group of permanent residents from Canada.

    3. How does Nancy evaluate the health of the orcas? What does she find?

      Nancy tests samples of the orcas' blubber, taken with a dart gun. These blubber samples showed very high levels of PCBs, a toxic substance.

  • Term Part of Speech Definition Encyclopedic Entry
    coast Noun

    edge of land along the sea or other large body of water.

    Encyclopedic Entry: coast
    culprit Noun

    person responsible for an offense or fault.

    killer whale Noun

    carnivorous whale, actually the world's largest species of dolphin. Also called an orca.

Tell us what you think