President Trump has enraged his opponents in the United States by pardoning Jan. 6 defendants, investigating his enemies and revoking security clearances. But in Italy, it is a different Trump who has set off a furor, wearing a camouflage beanie and sitting in a hole in the ground.

Italian lawmakers have accused Donald J. Trump Jr., the president’s son, of hunting a protected duck in Venice’s lagoon.

“It is morally despicable,” Luana Zanella, a lawmaker in Italy’s parliament said on Tuesday. “And it’s a crime.”

The fury among environmental activists in Venice started on Monday, when they obtained a video showing a group of hunters, including Mr. Trump, shooting ducks in the Venice lagoon. In a clip, which they shared with The New York Times, Mr. Trump, an avid hunter, is hiding among tall grass beside a pile of dead ducks, and describes his prey as an action movie soundtrack plays in the background.

“This is a rather uncommon duck for the area,” he says, pointing at a copper colored duck corpse at his left. “Not even sure what it is in English.”

Others were more sure.

“It’s a ruddy shelduck,” said Andrea Zanoni, a regional lawmaker in the northern Veneto region. “And you cannot hunt it.”