climbing. Their toe pads adhere via deformation of the soft epithelial cells. They also have long hind limbs for jumping from tree to tree. As compared to most Anura, most gas exchange occurs through their nostrils but actually release most carbon dioxide through their permeable skin. Distribution The hourglass tree frog is native to Mexico in specific areas of Mexico: southern Veracruz, northern Oaxaca, Chiapas, Tabasco, and the Yucatán Peninsula. D. ebraccatus have been commonly seen throughout more southern countries including Guatemala, Belize, Costa Rica, and Panama. There are only a few known populations of D. ebraccatus in Nicaragua and Honduras. They are even seen more frequently throughout the northern Colombia and northwestern Ecuador. Reproduction Hourglass tree frogs migrate to freshwater pools in vegetated areas to breed during the rainy seasons of Central and South America, between May and November. Once aggregated around freshwater pools, they utilize chorus as strategies to select mates. Males hide behind foliage around edges of marshes and ponds during the night and produce long mating calls to attract potential female mates. Once a male is selected by a female, he will climb onto her back and release his sperm into her cloaca. Females reproduce multiple times within the breeding season, with gaps between reproductive spells as short as 10 days. Females will lay between 180 and 300 eggs, separated between up to eight different masses within a single night. Egg clutches are laid either in single layers on the upper surface of leaves overhanging freshwater or in clusters connected to floating vegetation within the water itself. Hourglass tree frogs are unique in their reproductive plasticity, allowing them to produce both aquatic and arboreal eggs. Arboreal eggs are deposited on the upper surfaces of leaves overhanging water, so the tadpoles can roll into the water once hatched, and aquatic eggs are attached to floating vegetation within the water to keep the eggs from sinking. Mating Mate Searching Behavior Research on anuran communication reveals that groups of male frog chorus to attract female frogs to mate. The relative success of these male frogs at attracting females depends on how their advertisement call is able to lead females to their calling space. As male density increases, a male’s advertisement call is confused with the other calls. This confusion leads to females’ inability to find which calling space the advertisement call originated from. The lowest intensity of a neighbor's