Photo of vrabec polní, Passer montanus, Tree Sparrow, Feld Sperling
7/17/3 . . . a male House Sparrow (passer domesticus) did a hostile take-over of our resident barn swallow's nest. He threw the eggs out, redecorated with a bit of grass, and is now courting a female. Never seen bird-lovin' before today. Very "Wild Kingdom" from my armchair.
Eurasian tree sparrow
English House Sparrow. Shoot these on the spot because they will kill native song birds.