I'm not a linguist, but this seems like a wrong analysis to me. It seems to me you're imposing a specific word order paradigm where it may not be applicable. P

I'm not a linguist, but this seems like a wrong analysis to me. It seems to me you're imposing a specific word order paradigm where it may not be applicable. Perhaps these birds "parse" compositions in order of most recently received (e.g. as something like a LIFO), or by some other rule that is nevertheless (compositionally) significant.