Quest Nature Tours

Nope, never heard about them and even did a google search and I don't see many reviews about them too, apart from a facebook page.

Canadian company with dual names.....also Worldwide Quest. They do adventure nature trips. Been around since 1970 so can't be all bad. They come up when I search for northern polar bear or birding activities. I just won't pay the price for a solo. One of the few that organizes trips for whooping cranes in Canada. I tend to be picky and would take them if I can afford them.
Where do you want to go?

Maria-I like many of their nature trips, but the Taiwan and Madagascar ones look especially appealing.

Tammy, they do sound interesting. Madagascar isn't always a comfortable island to traverse, so a good company will make it easier. Hope they meet your expectations.