Here they call all of these large grasshoppers “Giant Grasshopper” and most are a variety of the officially named Giant Grasshopper. See the other one I photographed on my 2010 Caravan Tour while in Guanacaste, which was actually larger and all green and beige/brown. This yellowish one I photographed the other day going in Linea Vital for my physical therapy. You never know where you will see cool creatures! 🙂
Here’s a bigger one on someone else’s blog called Beach Life.
I can’t find a scientific article online. ¡Pura Vida!