Digesting a big meal takes energy, forcing some minnows to swim in spots at the rear of a school.

When it comes to tool making, the birds learn differently than humans.

In the presence of competition, archerfish become more hesitant but accurate shooters.

The smashing mantis shrimp is strategic in its attack on sea snails.  

While shifts in behavior could help wildlife and people coexist, they might also affect the animals’ survival.

Researchers find that conserving marsupials on a predator-free island dampens their avoidance behaviors, which could mean trouble for their reintroduction to mainland Australia.

When defensive, guppies display a warning sign to their counterparts. 

Researchers studying macaques in Morocco find that socialization improves the monkeys’ odds of surviving the winter. 

Some beetle species may have evolved to tunnel into the ground to escape the pathogens that abound on dead and rotting animals.