The Intelligence Of Corvids Ielts Reading Answers [2021] Jun 2026

An example of birds employing deception to protect their resources from rivals.

Explanation: Paragraph C states they "showed a preference for dropping items into tubes filled with water rather than tubes filled with sand."

Jane Goodall's work in 1960 showed that ________ were not the only ones to make tools. Since then, scientists have observed different kinds of animals making tools. New Caledonian crows, for example, make tools in order to retrieve the 9. ________ that they eat in the wild. Scientists believe that generally these birds 10. ________ how to make tools. In 2002, a captive New Caledonian crow named Betty invented a new tool. Scientists observed Betty use pieces of wire to make 11. ________ which she used to retrieve food. The interesting thing is that other crows did not 12. ________ the tools. Once the scientists saw Betty make a tool, they tried to get her to 13. ________ the behavior, which she did successfully.

Most animals live strictly in the present, but Western scrub-jays demonstrate "episodic-like memory." They can recall exactly food they hid, where they hid it, and how long ago it was cached. If they cache perishable food (like waxworms) and a long time passes, they will deliberately avoid retrieving them, knowing the food has spoiled. Furthermore, if they notice another bird watching them hide food, they will return later to re-hide it in secret, proving they can anticipate future theft. 3. Theory of Mind the intelligence of corvids ielts reading answers

Explanation: Paragraph E states "the ratio of brain-to-body mass in corvids is strikingly similar to that of a chimpanzee."

Unlike many animals that use found objects, corvids—specifically —are famous for making tools.

Crows, particularly New Caledonian crows, demonstrate the ability to make and use tools to acquire food. An example of birds employing deception to protect

To find the right answers, you must recognize these synonyms: To search for food.

To correctly answer questions, you must recognise these high-frequency terms:

Answer: B

Explanation: The text demonstrates that their preference changes depending on the time delay; they avoid perishable worms after a long delay because they realize the food has rotted.

Below, you'll find the complete reading passage, all 13 questions, and a detailed answer key with explanations.

For hundreds of years, humans thought that tool making was a uniquely human trait. In 1960, Jane Goodall observed chimpanzees using tools in the wild, a discovery to which Goodall's mentor Louis Leakey famously responded, "We must redefine tool, redefine man, or accept chimpanzees as human." It is now commonly accepted that various primates engage in tool making, and there is a growing body of evidence that many —a group of bird species that includes crows, jays, rooks, ravens, and magpies—are also tool makers, and that they show many other signs of possessing high intelligence. New Caledonian crows, for example, make tools in

An account of an experiment showing that birds can track the passage of time regarding food freshness.