Crows and jays know when they are being watched. If a jay realizes another bird is spying on its food stash, it will re-cache the food later in a more secure spot.
The "Intelligence of Corvids" is a frequent and highly challenging topic in the Academic IELTS Reading test. This comprehensive guide provides the complete reading passage, accurate answers, detailed explanations, and essential vocabulary to help you secure a high band score. The Intelligence of Corvids
These birds are famous for crafting tools from twigs and leaves to extract larvae from tree holes Scientific American. They don't just use tools; they modify them to be more effective, a process called tool modification. Crows and jays know when they are being watched
: Studies on rooks demonstrated they could coordinate efforts, such as pulling two ends of a rope simultaneously to access food.
Below is the comprehensive guide to this reading passage, including complete text breakdowns, verified answer keys, and strategic test-taking insights. Part 1: The IELTS Reading Passage The Intelligence of Corvids : Studies on rooks demonstrated they could coordinate
But the intelligence of corvids extends far beyond tool use. Professor John Marzloff at the University of Washington demonstrated that American crows possess a remarkable ability: facial recognition. To test this, researchers donned a caveman mask while capturing, tagging, and releasing several crows on campus. Later, when any researcher, wearing the same caveman mask, walked around the campus, the crows would immediately recognize the perceived "threat," mobbing and cawing at them. Even crows that had not been originally captured joined in the harassment, learning from others in their flock. When a person walked by without the mask, they received no reaction at all, proving it was the face the crows had learned to hate. As a testament to their problem-solving depth, when researchers wore the mask upside down, some crows tilted their own heads, trying to reorient the upside-down face to ensure the identity was correct.
Paragraph E concludes that this phenomenon is an example of "convergent evolution." Essential Academic Vocabulary Focus understanding these key behaviors—social planning
The intelligence of corvids is a testament to the adaptability of nature. For IELTS students, understanding these key behaviors—social planning, tool innovation, and remarkable memory—provides the "extra quality" knowledge needed to excel in passages detailing animal psychology and cognitive evolution. Additional Study Resources
Successfully uses the principle of displacement to retrieve a reward. (Answer: )