It was in autumn of 2018, when I looked around at a bird trader to find “something” in the field of insectivorous birds for my empty breeding aviary. And I hate empty breeding aviaries! It is never the case that all birds breed successfully (far from it), so there has never been a lack of aviaries for fledglings. But unfortunately there was nothing of my interest at the trader. Only that one couple of yellow cardinals, they were very beautiful, weren’t they? Completely against my habits, I bought the couple at instant, without reading or studying in advance. That would come when I got home. The yellow cardinal is found…