That makes sense, as I said above (after reading these posts) it seems to amount to how one defines intelligence. What you are referring to is survival/evolutio

That makes sense, as I said above (after reading these posts) it seems to amount to how one defines intelligence. What you are referring to is survival/evolutionary intelligence which is inate/built-in and expressed though a bird's genes. What I was referring to was the cognitive intelligence (ability to learn from circumstance and experience and act upon it as covids and currawongs do over and above their inate/instinctive behavior). I should have been more perceptive and not mixed these. This begs the question that I've posed elsewhere: the cuckoo and other parasitic birds would, I'd reckon, also act out of inate gene-based expression in that they'd have to be quite selective about which species of birds they lay their eggs in (as I said, if they were to lay eggs in an osprey or eagle's nest then they'd likely be food). Any info on this?