Purple Martin hatchling stages

Take a look inside a Purple Martin house with all the stages of eggs to hatchlings to beginning stages of feathers

[aDiam]

Have a martin box like that, years back owls would reach in grab the babies, those compartments are 6×6 which is too small for 5 babies and 2 adults, need to be 6×6×12 by drilling hole in the middle divider, that way the martins will build in the back compartment out of reach from owls