The Opus 16 oz. Oriole Feeder features a unique perch design and fun feeding ports that resemble orange slices. The bright orange hue of this feeder will attract orioles and encourage them to perch and sip oriole nectar. The shatterproof plastic base has a 16 oz. nectar capacity and 4 feeding ports, allowing 4 birds to share simultaneously. A built in ant moat and bee guards are two great features that will keep insects and bees from contaminating your nectar. This feeder is ready to fill and hang with the included brass rod. It may also be pole mounted for more stability. A ½" dowel or a ¾" - 1" diameter pole will do the trick.