New Caledonian crows, for example, have demonstrated remarkable abilities to create and utilize tools in their search for food. They use their beaks to create tools from twigs and leaves, shaping them into specialized tools to get insects out of trees.
What's particularly amazing, however, is that scientists have also observed these crows changing and improving their tools for different tasks. This behavior demonstrates great problem-solving abilities and creativity, and suggests an understanding of cause and effect. The crows' tool-making skills are considered among the most advanced in the animal kingdom, showing us the complexity of their intelligence.