I was checking my son's worksheet and came across this particular exercises about prepositions of location. I know that we use IN when something is inside or contained and ON when something is on the surface. I mean not covered. Am i right? But in this particular exercise, the bird was somewhat snuggled ON? IN? the surface of the nest.
I agree with Humble in this instance; but there's a special case involving birds incubating eggs (keeping them warm, so that they'll hatch). So if there are unhatched eggs in it, the parent bird is ON the nest.
Wow, that's a really tough call. The bird's feet could be either in the nest or on the rim of the nest. Hmm. Well, given we can't see the bird's feet, I'd have to side with the teacher on this one. "The bird's in the nest", at least its feet are.
I'd have said ON - maybe even 'perched on'. (This is a retraction of my earlier post, when I said in was more probable, but on was possible; in my view, the picture makes it one of those 'possible' cases.)