(NationalGeographic) - You might not know that these items are illegal or inhumane.

Taking a vacation this summer? As a traveler, you have the power to contribute to conservation. Maybe you’re considering staying in a low-energy ecolodge or buying carbon offsets for your flight. Sustainable travel gets easier every year.

Even travel companies are getting on board, making new pledges to stop wildlife trafficking. JetBlue will soon start showing a video onboard to passengers to educate them about the illegal wildlife trade, and cruise lines Royal Caribbean Cruises and Carnival have both pledged to educate their staff and passengers to eliminate the purchase of illegal wildlife products.

Many of us already know that it’s illegal to bring home elephant ivory, rhino horn, and tiger products. But there are numerous other souvenirs that you might not realize are putting wildlife at risk.

A good place to start is to ask these questions:

• What is this product made of?
• Where is it from?
• Do I need a permit to bring it home?

And when you come across the following items, a red flag should go up.

Sea turtle products: Did you know that six of the seven sea turtle species are endangered? It’s best to avoid sea turtle souvenirs altogether. That goes for jewelry, hair clips, musical instruments, sea turtle soup and eggs, sea turtle leather products, and anything labeled “tortoiseshell.”

Snake wine: In Southeast Asia it’s not uncommon to find bottles of wine stuffed with whole snakes for sale. Some believe it has medicinal value (not true), and others like the oddity factor. But the truth is, it’s cruel and inhumane. Snake wine is often made by drowning a live snake in alcohol. It’s also potentially dangerous—every once in a while, the snake doesn’t die. It awakens from a drunken sleep to bite the person drinking the wine. Or it passes on deadly parasites.