nature lovers

Question?????? There is a strange animal or bird making nightly visits to our back yard. We here it but a flash light and search through the yard has failed to reveal what it is. It is eating a cantaloupe that it took off of one one our plants. It makes a wierd sound like something from Jurassic Park. The one that ate the guy that stole the embryos. It kind roots around like a pig, makes sucking noises and then, and heres the tricky part, it sounds like it's laughing ( creepy). Tom thought it was a bird. One of Matthews' friends thinks it's a fox. Running around the yard with a flash light only silences it for a time. It doesn't run away or attack (yet) but hides. When we sit down and be quiet it starts up again. Anybody know what this could be? We are going to try and get a recording of it.