Droll Yankees presents its Bottoms Up nyjer feeders. Almost exclusively goldfinch feeders, the products require birds to hang upside down from the perches, the company reports. The feeders’ feeder caps and bases in Finch Flocker Yellow are designed to complement the cheery yellow feathers of male goldfinches. Available feeders include 16-, 23- and 36-in. sizes in the Droll Yankees Classic line and 15-in. and 23-in. sizes in the Bird Lovers brand.