Scarlet-rumped Tanager (Ramphocelus passerinii), Boca Tapada, Alajuela Province, Costa Rica, Central America

Red-rumped Swallow ( Hirundo daurica) gathering mud for nest building, Bulgaria

Red-rumped Swallow (Hirundo daurica) with beak full of mud for nest building, Bulgaria

Red-rumped Swallow (Hirundo daurica) on ground with beakful of mud for nest building, Bulgaria