Laguna de Santa Rosa
This may be a female Hairy Jumping Spider (Phidippus clarus) that builds a homey nest in a leaf that it sews closed. The male is red and black with turquoise eyes. It often waits upside down near the top of a plant and then quickly jumps down before the prey can escape. Fruit flies are a favorite food. The male spiders mate with the biggest female they can find - and the females have fights, often to dealth. Females die after one brood (up to 135 eggs) has left the nest. Check out the Wikipedia article to find out more.