The Tree Toad, or Hyla (4 letters), is a genus of frogs found in the Americas, Europe, and Asia. They are known for their distinctive calls, which are used to attract mates and defend territories. They are also known for their ability to climb trees, hence their name. They are usually small in size, ranging from 1-3 inches in length. They have a wide variety of colors, including green, brown, and yellow.