Showed that chimpanzees (or primates) were not the only ones to make tools.
New Caledonian crows only use tools that they find naturally in their environment.
She kept careful notes. The crows learned faster than expected. Older birds taught juveniles; mothers nudged beaks to show technique; subgroups of crows specialized — one became expert at tasks involving ropes, another at manipulating small objects. Once, when Mei hid the peanuts in a transparent box with a lid, a crow named Slate pushed another juvenile toward a stick propped against the lid. The juvenile used the stick to lift one edge and free the food. Mei observed what she later wrote in her notebook: "Not imitation alone — guidance."
The passage typically focuses on several remarkable behaviors:
Based on common versions of this practice test, here are the key answers and explanations for the typical question types: Question 1: Why did researchers wear masks? Answer: A (To conceal their true identity from the crows). Showed that chimpanzees (or primates) were not the
The "Intelligence of Corvids" is a frequent and challenging topic in the IELTS Reading test. This passage evaluates your ability to understand complex scientific arguments, identify text structure, and match specific information regarding animal behavior.
This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later.
The physical structure of a corvid's brain is identical to that of a chimpanzee.
For many years, the avian brain was dismissed as primitive, consisting mostly of a "striatum" responsible for instinctive, rote behaviors. This view was radically overturned when researchers discovered that the avian forebrain possesses a region called the nidopallium, which functions similarly to the mammalian prefrontal cortex. This area is highly developed in corvids, granting them an exceptionally high brain-to-body mass ratio—often referred to as their encephalization quotient—comparable to that of a chimpanzee. The crows learned faster than expected
One winter evening a fox appeared under the elm. The crows, sensing danger, executed a complex defensive maneuver. Some flew low and circled the fox, while others created a false scent trail by scattering leaves and dropping food elsewhere, drawing the fox away. Mei marveled at the strategy. It wasn't merely instinct; it resembled planning and cooperative deception.
The text for The Intelligence of Corvids is a popular IELTS Academic Reading passage that explores the advanced cognitive abilities of birds like crows, ravens, and rooks. It often highlights how their intelligence rivals that of primates. Core Passage Content
This sophisticated memory system also serves a protective social function. Corvids live in complex social hierarchies where theft is common. If a scrub-jay notices another bird watching it hide food, it will alter its behavior. Once the onlooker leaves, the cacher will return to dig up the food and re-hide it in a more secure, private location. Crucially, researchers found that this preemptive re-caching only occurs if the hiding bird has itself stolen food from others in the past. This suggests a form of mental attribution, where the bird projects its own past deceptive behavior onto potential competitors. Part 2: IELTS Exam Questions Questions 1–5: Matching Information
Answer: B (The crows did not harass them). Section 2: Matching Information (Theories & Experiments) The juvenile used the stick to lift one
The Intelligence of Corvids: IELTS Reading Answers & In-Depth Analysis
Corvids can recognize individual human faces and "hold grudges" against researchers who have previously bothered them. Memory & Caching: They can remember the locations of hundreds of food caches
Below are three distinct IELTS-style reading passages related to corvid intelligence. Each section provides the passage summary, the questions, the correct answers, and—most importantly—"Extra Quality" explanations that teach you why the answer is correct and how to avoid traps.
Answer: Corvids.