New Caledonian crows can not only use tools, but also use one tool to manipulate another tool. This crow uses a small stick in order to get a larger stick, which it can then use to obtain food.

See also:

• Joshua Klein: The amazing intelligence of crows (TEDTalks)
• crows crack open nuts using traffic
• crow bends wire to get food out of jar
• YouTube: Intelligent crows - tool use (BBC)

 Read more:

• Wikipedia: Crow / Bird Intelligence (Avian IQ)

From: newscientistvideo