This Old Nest: Birds Still Use 2,000-Year-Old Nest...
Wow - talk about living in an old house. When orni... ...gues carbon dated the guano and other debris of a gyrfalcon nest in Greenland, he got a very surprising answe... ...e ancient nests are still being regularly used by gyrfalcons ."While I know many falcon species re-use nes...
https://www.neatorama.com/2009/06/19/this-old-nest-birds-still-use-2000-year-old-nest/
