In 1980 The U.S. Fish and Wildlife Service published a landmark study (conducted by Aelred D. Geis) of bird food preferences. Black oil sunflower seeds were by far the most preferred type of birdseed and attracted the greatest number of bird species.
I let too many volunteer sunflowers take over my kitchen garden this year...
I don't have much of a vegetable harvest,
but I do have a lot of free birdseed!
American Goldfinch ~ Tufted Titmouse
To get a few closer shots of the locals enjoying the harvest,
I took a few fading sunflowers and offered them as a homegrown bird feeder.