Monster In The Woods

I am in my green house at around 2:30 a.m. when I hear something horrifying, in person it sounded almost amphibious or reptilian in nature mixed with a guttural sound. I've never heard anything in the woods that sounded like that, it sounded so loud. All I could do is stand there motionless in awe of the noise I heard. Afraid to make any sudden movements because it sounded like it was on the other side of the shed and it appeared to have startled from me watering plants. I called up my wife who was asleep in the house to see if she could see anything on the camera before I made my way out of the green house, with my knife in hand backing up slowly facing the woods on the ready I make it back inside safely.