You’re really not likely to see a jaguar in the Pantanal but you will definitely see a lot of mosquitoes. Be prepared, particularly if you’re one of those people particularly susceptible to bug bites.

DEET is the best insect repellant on the market. It comes in various strengths, represented by a % number, e.g., 10%, 15%. You should not need a concentration of more than 50% even in the Pantanal. Studies conducted in jungles show that the effectiveness of DEET concentrations of over 50% are only incremental.

Plant-based repellants are not as effective. DEET can be applied to clothing or directly to the skin, though some people prefer only to apply it to their clothing. It will not damage natural fibers or nylon.

Taking antihistamines before and during your trip is a very good way to deal with the mosquitoes. I used to take a lot of antihistamines whenever I went to the Everglades and never had a problem with mosquitoes. Indeed, I know some park rangers who take antihistamines regularly as a way of combating the little biting bugs.

A point of trivia is that only the female mosquito bites. Not that you’re going to spend much time trying to identify gender before swatting one with the back of your hand.

Mosquitoes are attracted to dark colored clothing, so wear light colored clothing in the Pantanal. Plus, you’ll be cooler anyway. I mean, you feel cooler in light color clothing. You may look cooler too, depending upon your personal style.

Mosquitoes are known for transmitting nasty diseases such as yellow fever and malaria, but these diseases are not present in the Pantanal.

The American College of Physicians has produced a clinicians guide to mosquitoes and mosquito repellants that give you all the scientific details that you would want on the topic.

Be advised that some bugs, such as horse flies, gnats, and chiggers, are not affected by insect repellants. You just have to tolerate those!