Are there any trees that monkeys cannot climb?

It's unlikely that there's a tree species that absolutely no monkey can climb. Monkeys are remarkably agile and have evolved specialized adaptations for climbing, such as strong limbs, prehensile tails, and opposable thumbs.

However, there are certain tree types that might pose more of a challenge to certain monkey species:

* Trees with very smooth bark: Some trees have very smooth bark, making it difficult for monkeys to grip.

* Trees with widely spaced branches: Monkeys need to be able to reach from branch to branch, so trees with wide gaps between branches might be harder to navigate.

* Trees with very thin branches: Monkeys need to be able to support their weight on branches, so trees with extremely thin branches might be too flimsy.

* Trees with thorns or spines: Thorny trees are a deterrent for all sorts of animals, including monkeys.

* Trees with a very specific growth pattern: Certain trees might have a growth pattern that is difficult for monkeys to navigate, such as a very dense canopy with few open spaces.

Important Note: Different monkey species have different climbing abilities. Some species are incredibly adept at climbing even the most challenging trees, while others are more restricted to certain tree types.

In summary, while there's no single tree species that all monkeys can't climb, certain types of trees might be more difficult to climb for some species than others.