Corvids have also been observed exhibiting complex social behavior, including cooperation and communication. For example, when a crow finds food, it will often call other crows to the location, using a variety of vocalizations to convey information about the food and its location.

Ultimately, the study of corvid intelligence forces a radical reconsideration of how complex cognition evolved. The fact that mammals and birds diverged from a common evolutionary ancestor over 300 million years ago implies that high-level intelligence developed independently in these two distinct lineages. This phenomenon, known as convergent evolution, proves that nature can arrive at the same advanced cognitive destination via entirely different neurological pathways. As research into the avian mind deepens, the line separating human reasoning from animal cognition continues to blur, establishing corvids not as instinctive automatons, but as true intellectual peers in the animal kingdom. Questions 1–6

In a famous experiment, New Caledonian crows were observed crafting hooks from wire to retrieve food from a tube. This demonstrates not just tool use, but tool manufacture , a skill once thought unique to humans. Furthermore, scrub jays have demonstrated 'episodic memory,' the ability to recall specific past events, and seem to plan for the future by storing food for later consumption. Some scientists argue this suggests corvids possess a 'Theory of Mind'—the understanding that other beings have thoughts different from their own—though this remains a subject of debate."

Found in Paragraph B: "...meticulously shaping them into hooks to extract grubs from deep tree crevices." (Note: "grubs" are a type of insect). 8. watchful rivals / rivals

Note: For the full, detailed passage and complete question set, please consult the resources at. The Intelligence of Corvids IELTS Reading Answers