Hi Setefano. Pratincol makes a great suggestion. I had fantastic views of a flock of Twite just before where the ferry leaves at Kilchoan. Also had a flyover White-Tailed Eagle
Then over to Mull Charters for photo opportunities. I've not used the company but I've seen some great photos from the trip. Having said that, the Eagles can turn up pretty much anywhere in that area of Scotland.
Hope you have a great trip.