When I tick sighted birds off a list, I’m ticking off a species. But species fit into “families.” How many families? In 1984, Simpson and Day showed this map. It’s interesting that the most number of families in one continent is 86 in South America, which also has a staggering number of 31 families found on no other continent. Australia has the second largest number of endemic families, namely 15.
Here I’m merely nibbling at the edges of the question of how many families exist, and will need to find a different book/text. I hope I don’t get confused.