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often act as "anchors." Locate these names first to find answers related to specific experiments.
Match the behavior described in the experiments with what it proves about their brains: Question 4: Boxes/Food Answer: F (Counting) Question 5: Ropes/Food Answer: E (Collaboration) Question 6: Hiding Food Answer: B (Memory) Question 7: Fake Nest Answer: E (Deception) III. Summary Completion: Tool Makers Chimpanzees Not the only tool users. Retrieved by New Caledonian crows. 10. Learn from other birds: Behavioral transmission. 11. Hooks: Made from wire by Betty. 12. Teach her how to make: She invented it. 13. Repeat: Success in experiments. Quick IELTS Strategy Tip When tackling this passage, watch out for specific names
Evidence of birds modifying human-made materials to achieve a specific goal.
New Caledonian crows displayed the ability to create tools, a capability previously believed to be exclusive to __________.
Do the following statements agree with the information given in the reading passage? In boxes 10–13 on your answer sheet, write: if the statement agrees with the information FALSE if the statement contradicts the information NOT GIVEN if there is no information on this often act as "anchors
Cracking the Code: "The Intelligence of Corvids" IELTS Reading Guide
The is a common IELTS Academic Reading passage that explores the cognitive sophistication of birds like crows, ravens, and jays. The passage typically highlights their abilities in tool-making, social cooperation, and problem-solving, which are often compared to those of primates. IELTS Reading Answers: The Intelligence of Corvids
Attributing potential deceptive intentions to other birds based on personal past experience.
While the passage mentions ravens in Paragraph A as part of the corvid family, it never compares the intelligence levels within the corvid family to state which one is the "most" intelligent. Core Strategies for This Reading Passage Retrieved by New Caledonian crows
To achieve a high reading score, you must recognize these academic words. Do not just memorize them—understand their use in context.
The physiological foundation of corvid intelligence lies within their brain structure. For decades, biologists assumed that because birds lack the layered cerebral cortex found in mammals, they were incapable of higher-order processing. Neuroscientists have since discovered that corvids possess an structurally dense cluster of neurons known as the nidopallium caudolaterale (NCL). The NCL serves an analogous functional role to the human prefrontal cortex. This region acts as the primary hub for executive functioning, working memory, and behavioral flexibility. Furthermore, when measured relative to total body mass, the brain-to-body ratio of a common raven is comparable to that of a chimpanzee. This structural optimization allows corvids to execute complex mental operations without requiring the massive physical brain size seen in large mammals. Paragraph C
The Myth of the 'Bird Brain'For generations, the phrase "bird brain" was used as a derogatory term to describe someone of low intelligence. This insult was rooted in early anatomical studies which revealed that birds lack a cerebral cortex—the layered structure in mammalian brains responsible for high-level cognition. However, modern neuroscientists discovered that corvids possess a densely packed cluster of neurons known as the nidopallium caudolaterale (NCL). The NCL functions analogously to the mammalian prefrontal cortex, acting as the command center for executive functions, decision-making, and working memory. Gram for gram, a crow’s brain has a neuron density that rivals or exceeds that of many primates, enabling complex information processing within a highly compact space.
Deciding which hidden food item to recover based on how much time has elapsed. followed by extra quality explanations.
The social realm of corvids also involves a high degree of tactical deception and paranoia, which strongly indicates the presence of a "Theory of Mind"—the ability to attribute mental states to oneself and others. When a scrub-jay is caching food while being watched by a rival bird, it will frequently engage in deceptive tactics. It may pretend to bury an item in one location while secretly keeping it in its beak, only to cache it safely elsewhere once the observer departs. Crucially, researchers noted that this preemptive re-caching behavior is only performed by birds that have themselves stolen food from other caches in the past. This suggests that the birds project their own past deceitful motivations onto onlookers, assuming others will behave as deceptively as they do. Paragraph F
: Studies on rooks demonstrated they could coordinate efforts, such as pulling two ends of a rope simultaneously to access food.
Below are three typical IELTS question types. The standard answer key is given, followed by extra quality explanations.