limbs to pull the clutch and then release it. Males also use their hindlimbs to stoke the jelly. Enemies A fringe-lipped bat, Trachops cirrhosus, is known to focus its attention on calling H. fleischmanni frogs. Some other organisms were also found to predate on H. fleischmanni: Prionostemma frontale, a species of Phalangids, has been found to predate H. fleischmannini during the pre-hatching stages of the frog. P. frontale will use their chelicerae to slice the jelly that contains the pre-hatch. They will then take out the embryos or eggs from the jelly while the post-hatching capsule looks like it has not been disturbed from the pre-hatching jelly. Moreover, Cupiennus was observed to be a predator of H. fleischmanni as well. Protective coloration In a 1991 study, it was found that H. fleischmanni reflecting near-infrared rays from 700 to 900 nm under infrared color photography detection, despite their own green skin, reflects visible light typically at 400 to 700 nm. Therefore, when they rest on photosynthetic leaf surfaces that also reflect infrared light, they are virtually indistinguishable both in visible light and near-infrared light ranges. Two functions were thought to be the reason for this discovery, although neither have been confirmed. One hypothesis is that the skin provides thermoregulative properties. Frogs keep their bodies warm because skin absorption causes protons of these wavelengths (near-infrared wavelengths) to lose energy as heat. In other words, heat is absorbed by the skin. Reflectence of infrared light by H. fleischmanni represents the ability to prevent extra heat gain.The second possibility is an improvement of cryptic coloration developed to avoid those predators with infrared receptors. Some animals, such as birds and snakes, have a presence in their bodies that helps them increase their sensitivity to near-infrared rays at night. For instance, snakes have TRPA1 in their pit organ which is an ion channel that works as the infrared receptor controlling the flux of calcium ions. This type of receptor gives snakes the ability to detect infrared light and this ability is often called "heat vision". If the frog's skin simply reflects visible green light, then green frogs on green leaves can still be spotted by these particular predators. Therefore, when the environment also reflects infrared light, H. fleischmanni can hind into the background even if the predators have such infrared receptors. At the same time, purple pigments were also found in their chromatophore, but the main