Introduction to the Little Grebe: The Little Grebe is also known as "Water Hyacinth". It is so named because of its short and round body shape, which floats and sinks on the water like a gourd. It looks like a duck, and some people mistake it for a small wild duck. The difference can be seen from the mouth. The little grebe's mouth is straight and pointed, and it often lives and hides in reeds or water plants.