Paul, I'll play. I have not looked in any books or at any other info online or elsewhere. Though I can see a couple of these sparrows from my window as I type. I'll look it up to see how I did, as soon as I press send. 10.5 gms Dark-eyed Junco 12 gms American Tree Sparrow 17 gms Chipping Sparrow 19 gms Brewer's Sparrow 20 gms Lincoln's Sparrow 20 gms Vesper Sparrow 20 gms White-crowned Sparrow 26 gms Savannah Sparrow 26 gms - Fox Sparrow 29 gms - White-throated Sparrow 29 gms - Song Sparrow 32 gms - Golden Crowned Sparrow 36 gms - Harris Sparrow Fun game! Cheers, Brandon Wagner Independence