Facts about Crows
- 10
Crows produce a variety of distinct vocalizations including at least 12 different call types, each conveying specific information about predators, food sources, or social status within their groups.
- 09
Crows demonstrate metacognition by assessing their own knowledge, refusing to guess on difficult tasks and instead requesting hints, a cognitive ability previously thought exclusive to humans and great apes.
- 08
When offered a choice between two food items, crows consistently select the larger quantity even when the smaller portion is more immediately accessible, indicating they can estimate numerical values and plan for greater reward.
- 07
New Caledonian crows manufacture barbed hook tools from palm leaves, a complex technique requiring multiple manufacturing steps that takes young birds several years to master through observation and practice.
- 06
Crows fashioned tools from twigs and leaves in New Caledonia, with some populations developing distinct regional tool designs passed down across generations through cultural transmission.
- 05
During winter, crows in temperate regions gather in communal roosts that can number up to 15,000 birds in a single location, providing shared warmth and predator detection.
- 04
Crows can live 15-20 years in the wild and up to 50 years in captivity, making them among the longest-lived bird species relative to their body size.
- 03
A crow's brain comprises roughly 2.7 percent of its body weight, matching the brain-to-body ratio of great apes and exceeding that of most other bird species.
- 02
In laboratory tests, crows solved multi-step puzzles requiring up to 8 sequential actions to obtain food rewards, demonstrating problem-solving abilities comparable to great apes.
- 01
Corvids like crows can remember individual human faces for up to five years and share that information with other birds in their social group.