Did you say something?

I have lived in my same house since 1977. I have been walking dogs in the neighborhood every summer since then. Mostly I have walked in the subdivision on the sidewalks or on the main roads nearby, but I have been doing it for 28 years.

This week I went down a path I don't normally take. It's like a mini-forest that goes between two houses for several hundred yards to a school. It's totally shaded from trees, has grass on the ground (gets mowed regularly), and bushes along the fences on each side. I found blackberries in there on Monday. I tried to give some to the dogs, but they didn't like them. I didn't think there was any food they didn't like.

They found some interesting smells in there. I assume rabbit trails, so they drag me down that way every day now. At the end of the path is a running track for the school. I walked up to the track today and went to turn around when I heard a strange sound.

It sounded like a broken guitar string. A plucking sound. I looked around, trying to place this loud, yet dull, sound. I looked down. There was water there. I never knew it, but there is some sort of river or drain there. The water is gross, totally swampy green.

I am wondering if it was some kind of alien frog? Anyone familiar with that sound? I couldn't see anything alive in there. There was such a scum on the water that I can't imagine much in there being alive. It didn't really sound like an insect, but it could be. A broken guitar string is the best way I can think of to describe it.