Migration

Which of the following statements is not true about blue whales?

• Each year blue whales travel thousands of kilometres in search of food.
• They spend the winter months in the warm waters of the Tropics where many of them give birth to their young. 
• When summer arrives, some of them migrate south to Antarctica and others go north to the Arctic.
• All of them are looking for the rich supply of fish which is found in polar waters.

What do blue whales eat?

• salmon
• seals
• plankton
• cockles, clams and oysters

Why do the Pacific salmon travel hundreds of miles from the ocean up to American rivers?

• to breed
• to feed
• to eat
• to enjoy swimming against the currents

When the Pacific salmon start their journey, their bodies are very strong, but as soon as the salmon leave the sea they stop eating. 

• true
• false

Which of the following statements about Arctic terns is not true?

• Arctic terns fly an incredible 40,000 km every year as they travel between the North and South Poles.
• They also probably see less daylight than any other animal on earth.
• In their northern home during the summer, the sun doesn't set.
• They experience the same long days in their winter home in Antarctica.

Ruby-throated hummingbirds only weigh a couple of grams.

• true 
• false

Three times a year ruby-throated hummingbirds take off from the USA on a 2,400 km journey before they finally land in Costa Rica.

• true
• false

This journey includes a 960 km, 20-hour non-stop flight across the Gulf of Alaska.

• true
• false

How do penguins not migrate?

• by flying
• by swimming
• by walking

How can penguins manage to migrate from Antarctica as far up the east coast of South America as Rio the Janeiro in Brazil?

• using the backs of stronger animals
• using currents and sea temperature