It was raining heavily in Guangzhou. Really heavy rainfall, which continued almost 24 hours. Then, all of sudden, it stopped at around 8 am today. As I was walking towards the School of Urban Planning and Geography to be part of a workshop, I came to notice this very funny sound. Some people were gathering around the area, also finding the sound amusing. I couldn't help recording it. I think they were frogs, but they could also be toads? If you look carefully, you will find quite a few of them in the first picture. The second picture is a zoomed-in version.
Photos and recording all taken just before 9 a.m. at Sun Yat-sen University, Guangzhou, China