The Osprey

First, "The Osprey" would be a cool name for a book, song, or something.  Second, my dad and I went out for a boat ride yesterday, (I said "today" at first, I really have not been paying attention to things lately) and saw an osprey nest.  We got close and took a couple pictures.  However, when we got too close, she/he/it starts squawking at us, either calling for assistance, shooing us off, or both.