3C. Where there are no ravens

I was at the southern tip of South America, and there were no ravens. I saw no crows, either. This was latitude 55º S., the Antarctic equivalent of southeastern Alaska and northern British Columbia. The natives of the Arctic are famous for their stories about Raven. So where were South America's trickster birds?
 
It turns out there are none. Every other continent around the globe has some member of the crow or raven family. Northern South America has a jay, which is a cousin of the Corvids. But ravens and crows have scarcely moved south of Mexico in the Americas.
 
The bird-watchers at Living Wild in South America explain that the Corvids probably had no reason to go far south – though that does not seem to stop most explorers from moving around the world, and it has not kept ravens out of Africa or Australia. The Living Wild photographers also mention the interesting caracara family, suggesting that these bold and common birds of South America may out-compete ravens for the omnivorous scavanger slot. Maybe so, but caracaras seem solemn, no-nonsense birds to me, more like eagles and hawks. The role of sassy entertainer is still open in southern South America, currently filled by smaller birds like the chucao.
 
Whatever the reason for their absence, I missed ravens in the bogs and tundras of southern Patagonia.

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Have you ever been surprised by the absence of something you had always assumed would be there?