Sentence examples for can become aggressive from inspiring English sources

In the summer breeding season, which is fast approaching, they can become aggressive.

They can become aggressive when begging for food, and are known to bite when teased, she said.

This is not the first study to suggest that water-dwelling creatures can become aggressive in small tanks.

If a stranger steps into the yard, she said, the dog can become aggressive because someone is in its territory.

Though normally calm, they can become aggressive if  they feel their calves are threatened, so be sure to  give them a wide berth.

But Dr. Wann's research and work by other psychologists show that ardent fans can become aggressive or even violent at a sports event when their team is threatened with losing.

These birds occasionally bite to tease and to get your attention, but they can also become aggressive out of jealousy, so be prepared to spend regular, quality time interacting with your bird.

Vancouverites are generally friendly, except when they get in their cars, where they can become notoriously aggressive - we're talking Los Angeles or New Jersey aggressive.

"If human beings don't have their own private space they can become very aggressive.

Shooting elephants with spears and guns is both illegal and incredibly dangerous, as a wounded elephant can become very aggressive".

A demented, confused person, he noted, can become suddenly aggressive over seemingly trivial things, like a change in daily routine or feeling crowded or rushed.