Section 4 recording
Avian Sleep Adaptations
You will hear an avian biology lecturer talking about the science of sleep in birds.
One speaker · British English · 3:34
In the real test you hear each recording once. Read the questions first, then play it through without pausing.
Go to the questions ↓Questions 1–6
Complete the table below. Write ONE WORD AND/OR A NUMBER for each answer.
Word limit: ONE WORD AND/OR A NUMBER
Avian Sleep Adaptations
| Bird species | Observed sleep pattern | Key function or benefit |
|---|---|---|
| Mallard ducks | One brain hemisphere rests while keeping an eye open for a 1 | Provides group defence while allowing basic rest |
| Frigatebirds | Micro-naps in flight totalling only 2 minutes a day | Supports long-distance foraging over open ocean |
| Alpine swifts | Continuous flight lasting for up to 3 months | Reduces contact with various 4 near the ground |
| European starlings | Brief periods of REM sleep accompanied by 5 twitching | Aids memory consolidation during 6 learning |
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