The Intelligence Of Corvids Ielts Reading Answers Extra Quality 'link' Link

BExplanation: The final paragraph discusses how nature arrived at complex intelligence via two entirely different brain structures in birds and primates, which defines convergent evolution.

Scientists have always known that birds possess a highly advanced neurological structure.

One of the most compelling indicators of corvid intelligence is their sophisticated deployment of tools. While tool use was once considered a uniquely human trait, and later observed in chimpanzees, corvids have taken this capability to astonishing heights. The New Caledonian crow ( Corvus moneduloides ) is particularly renowned for this. In the wild, these birds manufacture their own tools from twigs and pandanus leaves, meticulously shaping them into hooks to extract grubs from deep tree crevices. In laboratory settings, scientists have observed these crows solving multi-step puzzles that require using a short tool to retrieve a longer tool, which is then used to reach a piece of food. This demonstrates abstract reasoning and sequential planning, rather than mere trial-and-error learning. Paragraph C

Corvids protect themselves by tricking their enemies (deception). Section 3: Summary Completion

FALSEExplanation: The text states that early scientists had a "misconception" and that their views were shattered by modern neuroscientists who discovered that birds use the NCL for high-level cognition. While tool use was once considered a uniquely

The development of similar intelligence levels in both primates and corvids is an example of __________.

What did the experiment with Betty the crow prove to researchers?A) Crows prefer artificial tools over natural ones.B) Tool modification in corvids is based on reasoning rather than instinct.C) Corvids cannot solve problems without human assistance.D) Wire is the most effective material for crow tool-making.

: Species like rooks have been observed pulling ropes simultaneously to access food that one bird could not reach alone.

Matches Question 2 (future research and evolutionary theories). Decoupling Complex IELTS Vocabulary In laboratory settings, scientists have observed these crows

The Intelligence of Corvids: IELTS Reading Answers and Extra Quality Guide

Locate the relevant sentence: "Rooks do not use tools in the wild because they do not need to, not because they can't." However, the next sentence provides the direct quote from Bird: "Wild tool use appears to be dependent on motivation ." This is a classic IELTS "paraphrase" trap. The question asks for the direct cause (lack of), and the passage explicitly identifies "motivation" as the missing factor. Many students mistakenly write "need," but the passage states they do not need to, implying they are not motivated to do so.

One of the most striking examples comes from New Caledonian crows. In controlled experiments, these birds have been observed bending straight wires into hooks to retrieve food from tubes—a behaviour once considered unique to humans and a few primates. More remarkably, they display metatool use : using one tool to obtain another, more effective tool. A famous 2007 study showed a crow named Betty spontaneously bending a wire without prior training, suggesting not just trial-and-error learning but genuine insight.

Paragraph D mentions they choose nuts over worms only when the worms have decayed, but the text does not state their overall preference under normal conditions. In a second experiment

The most successful or highest point of something.

Betty the crow had been extensively trained to bend wire before the laboratory experiment.

| Word | Part of Speech | Definition | IELTS Example Context | | :--- | :--- | :--- | :--- | | | Noun | A bird of the crow family (including ravens, crows, jays, and magpies). | "Corvids are found on every continent except Antarctica." | | Cognitive | Adjective | Related to conscious mental activities (thinking, reasoning, remembering). | "The study focuses on the cognitive abilities of non-human animals." | | Neuron | Noun | A nerve cell; the basic building block of the nervous system. | "Corvids have a high concentration of neurons in their forebrain." | | Foraging | Noun/Verb | The act of searching for and gathering food. | "The birds displayed strategic foraging behaviors." | | Cache | Verb/Noun | To store something away (usually food) for future use. | "The jay learned to cache food only when no other birds were watching." | | Episodic Memory | Noun | Memory of specific past events, including the "where" and "when" details. | "Storing and recovering food requires highly developed spatial and episodic memory." | | Manipulate | Verb | To handle or control a tool or object skillfully. | "Rooks are able to manipulate stones to raise water levels." | | Inhibit | Verb | To stop or restrain an impulse. | "The bird required self-control to inhibit the urge to eat the food immediately." | | Nidopallium Caudolaterale (NCL) | Noun | The avian brain region analogous to the human prefrontal cortex. | "The NCL is believed to act like the problem-solving part of the human brain." | | Rival | Verb | To be comparable to; to match or beat in competition. | "Corvids rival great apes in physical intelligence and problem-solving ability." |

where they hid things or protecting themselves through trickery. Birds stopping after finding five items: Proves corvids can Building a "fake" nest: An example of how corvids protect themselves by tricking IELTSMaterial.com Preparation Tips for this Passage Identify Paraphrasing

— Most researchers assume this tool use is cultural rather than instinctive.

In a second experiment, rooks selected larger stones over smaller ones, realizing that larger stones displaced more water. In a final experiment, rooks distinguished between water and sawdust, dropping pebbles only into water. Despite these skills, rooks are not believed to use tools in the wild because they do not need to, not because they cannot.