4 males and 1 female Northern Oriole at our feeder.  We feed cut oranges and grape jelly.  The orioles have a sweet beak.  We also have an oriole feeder that is similar to a hummingbird feeder, with the same nectar mix.  We have 9 Northern and 2 Orchard Orioles with us today, but that number will drop to one or two nesting here as the rest push northward.