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   Cliff Swallow
   Petrochelidon pyrrhonota		  Bear River Migratory Bird Refuge
 Box Elder, Utah
 27 Apr 2020
   		 by Cliff Miles
 ©Cliff Miles

Getting mud to build nests
   Cliff Swallow
   Petrochelidon pyrrhonota		  Bear River Migratory Bird Refuge
 Box Elder, Utah
 27 Apr 2020
   		 by Cliff Miles
 ©Cliff Miles
   Cliff Swallow
   Petrochelidon pyrrhonota		  Bear River MBR
 Box Elder County, Utah
 August 2008
   		 by Jim Huddle
 ©James P. Huddle
   Cliff Swallow
   Petrochelidon pyrrhonota		  Bear River MBR
 Box Elder County, Utah
 August 2008
   		 by Jim Huddle
 ©James P. Huddle
   Cliff Swallow
   Petrochelidon pyrrhonota		  UVSC Campus
 Orem, Utah
 16 May 2007
   		 by Wayne Whaley
 ©Wayne Whaley
   Cliff Swallow
   Petrochelidon pyrrhonota		  Juvenile
 Bear River MBR
 Box Elder County, Utah
 24 Jul 2009
   		 by Kent Keller
 ©Kent R. Keller