Orioles will flock to your backyard with an ample supply of oriole nectar placed in perky-pet oriole feeders. This nectar concentrate, made with a 100% sucrose formula, is just what the black-and-orange birds are after as they seek out high-energy food sources. This 32 oz. Bottle can make up to 128 oz. Of oriole nectar, just mix one part concentrate with three parts water.