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The dolphins have become shell-collectors, using their snouts to pick up and transport large conchs. The dolphins seek out the shells to hunt fish that are sheltering within.


 shell dolphin foraging animal intelligence evolution invention
A common species of stinging ant has a simple way to handle food items that are too large for one ant to carry alone. It brings in a fellow worker to help. When worker Pachycondyla chinensis ants find very cumbersome snacks, they return to their nest and literally grab another ant in their jaws, carry it over and drop it next to the food.


 ant social work food foraging animal intelligence