witnesses heard bizarre loud screams while out catching bullfrogs in a swamp. witnessed in Ascension Parish, Louisiana

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this was years ago and the party involved has shared it with no one.I was 8 years old. My brother and two cousins and I were camping miles back in the swamp in a floating camp only accessible by boat. my brother was 19 at the time and had brought me on his endeavers quite often. i was a lucky eight year old as I was able to go with him and fish and hunt deer and gators.(mostly spectating of course). this particular night we had put several miles on the boat frogging(catching bullfrogs) and i was glad to get back to camp to rest. my cousin had an old bullhorn that you blow to call hunting dogs with and he promised to blow it at straight up midnight to get a screech owl to scream back. well it was a little after 1:00 and he gave it one long blow. we were all lying on our cots in the moonlight listening for an answer. now i really don't know what we heard but it was a scream that just can't be described. i've heard many things in the swamp,even a panther scream one time. nothing was clo...