Monkeyfrog, just happened to be lurking here and looked at your website. I know this is off topic but I have a serious question for you, that some will no doubt find amusing....
I live not far from the gravel pit and there's something living (several somethings actually) under my back porch. Whatever these creatures are, they're real loud and make a sort of a squawking noise. They let out a few of these squawks every so often and then I won't hear them for an hour or two. Is there some kind of frog that lives in this area that squawks?