What Is This SOUND? Sounds Very Horrible

I was at Walmart Mart. I parked next to this gated pond that has lily pads in it. During the day you can caught geese in there. I have never seen any frogs during the day and I don't go near there at night. When I got out of my car I heard the most terrify noise come from over there. Here is what I heard. I have never heard this before and I go here quite often at night.