Naturalist Greg Greer


A lifelong naturalist, Greg Greer is one of IE's guest-favorite guides, having spent 11 years on-staff as an expedition leaders and photographer. Over the 20 years that he has been guiding tours, Greg has gained a reputation for his friendliness and good humor, along with his incomparable knowledge of natural history. Greg’s travels have taken him to 50 countries to see the most remarkable wildlife areas in the world, including Antarctica, Australia, India, Indonesia, Africa and of course, the Peruvian Amazon.naturalist guide greg greer



Poison dart frogs may be observed in many of International Expeditions' Neotropical destinations. Our Costa Rica tours and Amazon cruises are two of the best trips to observe these amazing little frogs in their natural environment.

The Nile crocodile is Africa’s largest reptile and it is certainly up near the top in being one of the most dangerous animals on the continent. A large Nile crocodile may reach close 20’ in length and as they grow beyond 12 feet in length, their girth and massive body proportions greatly increase with the additional growth. Truly magnificent creatures, Nile crocodiles will prey on virtually any animal that ventures near the water.

As the sun sets over the Western skies of the Upper Amazonian rainforest, something quite magical occurs. The sky may be a glorious riot of colors which gradually give way to darkness. Darkness, like many people have never seen as there are no city lights to obscure the sky and very soon after dark it is obvious there are a trillion stars in the sky. Amazingly, constellations that may be most familiar to us are not apparent.

The spiny-tailed iguana is a large iguanid but it is not the same as the green iguana that many people are most familiar with. In Costa Rica, both green iguana and spiny-tailed iguana are common, but the spiny-tailed is certainly more abundant - and much more conspicuous - on the Pacific coast.

matamata-turtle-amazonThe matamata is truly one of the world’s most unique and bizarre turtles. One look at this species and it's pretty obvious that this turtle is something very different, especially when compared to the North American species that many of us are familiar with. 

International Expeditions' small-group tours are perfect for getting to know both the environment and your fellow travelers. Guests always like to quiz their guides and each other abotu favorite travels. Our own naturalist and Expedition Leader Greg Greer weighed in on the question: What is your favorite place?

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Look out! Not every plant on the Galapagos is safe to touch. This is almost true in any area of the world as there always seems to be a plant of two or even more that can cause severe dermatitis when simply touched. Most people in the U.S. are very much aware of the poison ivy, oaks and sumac. We learn to recognize these plants, especially after a reaction from exposure to these plants. But as I’ve always said, while learning by experience may sometimes be the best method of learning, it is certainly not the most comfortable way. 

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