Good questions! That's all separate 4x4's, held together with ten and six inch nails. That was the most horrible part. My drill could only last for about three holes before having to be recharged, and it took all my strength to dripp them. Hammering the nails in wasn't hard.
Possible bird predators would include crows (torts are too big) hawks (torts are either under cover or in burrows and my hawk that is sort of hanging around now goes after butterflies- he's small- and I decided that they are probably not of interest to hawks anyway with my huge squirrel population)and at night they are in burrows, so owls couldn't get them. Then I have known foxes out in the woods, and an electric fence is planned- two strands attached right to the outside walls. I don't think the foxes will bother them, and I have never seen a raccoon in the area, even a road kill, but still don't feel comfortable without an electric fence. It'll have to be on a solar charger. That's the next step of the project. I only recently got the last two courses of 4x4's on, and the trim.
Nanci
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1.0 Classic Corn, 0.1 Lavender, 0.0.1 Cali King, 0.1 Nelson's Milk
1.0 Tricolor Hog, 0.1 Eastern Hog, 1.0 Florida King
0.1 Eastern Box Turtle, 1.0 Florida Box Turtle
0.0.2 Desert Torts, 2.0 Feral Pigeons