Texas Bluebird Society:
House Sparrow eggs from six different nests
Texas Bluebird Society:
59 House Sparrow eggs from 30 females plus 1 bluebird egg
Texas Bluebird Society:
062310 House sparrow egg in bluebird box
Texas Bluebird Society:
House Sparrow adults
Texas Bluebird Society:
HOSP eggs
Texas Bluebird Society:
House Sparrow nest from side