Corvids can remember thousands of locations where they have hidden food, sometimes for months. They can even recall what type of food was hidden (perishable vs. non-perishable) and adjust their retrieval behavior accordingly (a behavior known as "episodic-like memory"). Part 2: "The Intelligence of Corvids" IELTS Reading Sample
Evidence of a bird species altering an unfamiliar synthetic material to solve a problem. Questions 6–9
The New Caledonian crow is the "poster bird" for this trait. Unlike many animals that simply use found objects, these crows tools. They can trim twigs into hooks or strip pandanus leaves into barbed probes to extract grubs from deep crevices. In laboratory settings, they have even been observed bending wire into hooks to retrieve food baskets—a feat that requires an understanding of physical properties and "means-to-an-end" logic. 2. Social Complexity and Deception
An account of an experiment showing a bird's awareness of how food spoils over time. Corvids can remember thousands of locations where they
An account of how birds track the degradation rates of different food items.
Betty the crow created a __________ out of wire to retrieve food from a tube.
7-8
masksExplanation: Found in the fifth paragraph, detailing the University of Washington experiment where researchers wore distinct masks.
Paragraph E describes tactical deception in ravens. It states that if a raven notices another bird watching, it will "fake a cache" by digging an empty hole to mislead potential thieves.
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Paragraph four directly links their scatter-hoarding habits to an "episodic-like memory" system. Part 4: Key Vocabulary for IELTS Candidates
Do the following statements agree with the information given in the reading passage?Write: if the statement agrees with the information FALSE if the statement contradicts the information NOT GIVEN if there is no information on this