Dianne Yudelson used a variety of methods to make her bird photos look like antique tintypes. Pictured here are mallards.
"With the waldrapp ibis, I was following him and taking his picture every few minutes," Yudelson said. "And finally he just gave me that look. He put all his feathers up and looked over at me like, 'Seriously, what are you doing?' "
A snowy egret. Yudelson found many of the birds while driving around her hometown in Pleasanton, California.
A photo of starlings. Yudelson kept many of the shots close-up and centered on the birds because she felt it expressed her personal connection with them.
A ruby-throated hummingbird. "If I'm driving down the freeway and I see (a bird) out of the corner of my eye, I will detour or stall or sit and wait in a ditch," Yudelson said.