: Crows identifying individual human faces, especially those of researchers wearing masks who previously handled them. Typical Question Types & Answers
Always check the instruction count (e.g., NO MORE THAN TWO WORDS ). If the text says "the brain encephalization ratio," and your limit is two words, write "brain encephalization" or "encephalization ratio."
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You can find full practice tests and detailed scoring guides on platforms like IELTS Material and upGrad Abroad . The Intelligence of Corvids IELTS Reading Answers
The intelligence of corvids is not just a fascinating scientific topic—it is a gift to IELTS test-takers. Because the subject contains concrete examples (specific species, precise experiments, and clear cause-effect relationships), it lends itself perfectly to the question formats the IELTS exam loves: matching headings, flowcharts, and True/False/Not Given. This link or copies made by others cannot be deleted
Corvids are birds that are known for their intelligence. They are considered to be one of the most intelligent bird families, and their intelligence is likely due to their large brain-to-body mass ratio. Corvids have been observed using a variety of tools, including sticks, rocks, and even pieces of bark, to obtain food and solve problems.
❌ and C are incorrect because the reaction was based on the specific face (the mask), regardless of the wearer's size, gender, or behavior on campus. B. the crows did not harass them ✅ Try again later
| Corvid Species | Known Cognitive Ability | IELTS Testing Context | | :--- | :--- | :--- | | | Manufactures hooked and stepped tools from pandanus leaves; cumulative technological evolution. | Matching headings; Flowchart completion; True/False/Not Given. | | Western Scrub-Jay | Episodic memory; recalls where, when, and what food was cached; plans for future needs. | Multiple choice; Summary completion. | | Rook | Solves water displacement tasks (Aesop's fable); selects appropriate tools; distinguishes between liquids and solids. | Sentence completion; Matching endings. | | Magpie | Passes the mirror self-recognition test; demonstrates self-awareness. | Multiple choice; Identifying information. | | Common Raven | Pre-plans tool use up to 24 hours in advance; selects correct tools from a set. | Yes/No/Not Given; Matching features. |
Perhaps the most striking demonstration of corvid intelligence is their ability to use and manufacture tools. The New Caledonian crow, for instance, is known to craft hooks from twigs to extract insects from tree bark. Unlike instinctive behaviours, this skill is learned and refined through observation and experience. In controlled experiments, these crows have spontaneously bent wires into hooks to retrieve out-of-reach food, a feat not mastered by most primates without training. Similarly, rooks have been observed dropping stones into a water-filled tube to raise the water level – a behaviour reminiscent of Aesop’s fable – indicating an understanding of cause and effect.
: Ensure the text explicitly confirms a behavior; don't assume a bird can do something just because it seems "smart" enough. elearn.edu.vn