This is not a thrasher; it is an earthcreeper, a furnarid/ovenbird. The family ranges from Mexico to South America, so North American birders might not be familiar with them.

This shot was captured in the Yeso Valley above Santiago (at around 8,500'). These guys spend most of their time scraping around in the brush, so I was stoked that
this guy popped up on this perch.

I've also added a photo of the Yeso Valley. Not much grows on the slopes given the lack of rain, but snowmelt sustains the valley floor year-round.

Canon 600mm f/4 IS II + 1.4x III on EOS R5
1/3200 at f/8 (for depth across the rock), ISO 1000
Cloned out several large poops on the rock. It rarely rains in the Yeso Valley, so poops tend to accumulate on prime perches.

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