Any guesses (1 Viewer)

The other day on 8/30/2014, I was birding and photographing birds at Kipuka21 on Hawaii Island. While looking in the canopy of the ohia and koa, I saw a large black bird about the size of a common myna, fly through the trees. Unfortunately, I was unable to get a photo. I was wondering if anyone can guess what it may be? It was early in the morning about 6:30am, near the closed gate to the kipuka.

By size omao would be the most likely suspect, since everything else expected there is smaller. "Black" vs. grey can be very misleading depending on the lighting.

That's what i thought too,but it had a longer tail. It was smaller than a kalij. Hopefully I can get a photo if I see it again.

God...I hope it wasn't a bulbul