What do birds eat?  Have a look below ...

Butterfly:

Ash-throated Flycatcher, with butterfly (California Sister)

Big fish:

Double-crested Cormorant, with big fishMilpitas, CA

Little fish:

Great EgretShoreline Park, CA

Lots of fish:

Atlantic Puffin, with beak full of sand eelsThe puffins carry these fish into their burrows to feed their young.

Iceland

Dragonfly:

Ash-throated Flycatcher, with dragonflyCupertino, CA

Sparrow:

Merlin, feeding on Song SparrowFremont, CA

More images of Merlin with prey here.

Flower:

House Finch, feeding on Ocotillo flowerAnza-Borrego Desert State Park, CA

Nectar:

Rufous HummingbirdMilpitas, CA

Acorn:

Acorn WoodpeckerPalo Alto, CA

Vole:

White-tailed Kite, with preyFremont, CA

Siren:

Great Blue Heron, with Greater SirenLakeland, FL

Clam:

Surf Scoter, with clamMountain View, CA

Crayfish:

Hooded Merganser, with crayfishSan Francisco, CA

Snake:

Gnat:

Yellow-rumped Warbler, about to snatch an insectMalibu, CA

Seeds:

Painted BuntingPort Aransas, TX

Persimmon:

Red-breasted Sapsucker, feeding on persimmonsCupertino, CA

Crab:

Willet, with crabMountain View, CA

Ant:

Western Tanager, eating an antSierra City, CA

Spider:

House Wren, with spiderPalo Alto, CA

Rabbit:

Northern Harriers: parent delivering rabbit to fledglingThe entire episode is documented in this blog post.

Caterpillar:

Western Bluebird, male eating caterpillarMilpitas, CA

Berries:

Cedar Waxwing, feeding on toyon berryFremont, CA

Sea Star:

Western Gull with sea starMonterey, CA

Lizard:

Greater Roadrunner, with lizardTucson, AZ

Frog:

Great-tailed Grackle, with frogMilpitas, CA

Cherry:

Gartered Trogon, feeding on Surinam CherryLa Milpa, Belize

Centipede

Trinidad Motmots; offering a centipedeTobago