Juniper Sky

This is a photo of a dead raven we came across when we were out riding around the property. It was high up in a juniper tree and I took this telephoto. I wonder what happened. Could it be Nile virus? Did it die during the recent cold spell?

We've had at least 6 inches of since last night. There's way too much snow for March! Oregon Juncos were the bird of the day at the feeder along with house finches.