If you take the construction of a circular bowl in your stride as instinctive, how does the bird come up with the windbreak/entrance design that shields the eggs/chicks from the elements, and at what point in fashioning the bowl do they start to construct it?
If you think you could build this
Try it without using your hands!
And now stop to consider this:
Where did the knowledge to do this come from?
TRULY THERE IS A MASTER CARPENTER!