Not to be a tree hugging, granola crunchy, PETA person, cause I am not... and you all might be aware of this already, but here goes, before we have calico hawks flying around, don't scare or otherwise harass it if it is on the endangered migratory bird list... huge fines if you get caught.
Here is a link to thread for permits for permanent removal of migratory birds including raptors, in case they become a real issue for you.
http://www.fws.gov/migratorybirds/mbpermits.html
"Legal Status
All hawks and owls are federally protected under the Migratory Bird Treaty Act (16 USC, 703-711). These laws strictly prohibit the capture, killing, or possession of hawks or owls without special permit. No permits are required to
scare depredating migratory birds
except for endangered or threatened species (see Table 1), including bald and golden eagles.
In addition, most states have regulations regarding hawks and owls. Some species may be common in one state but may be on a state endangered species list in another. Consult your local USDA-APHIS-Wildlife Services, US Fish and Wildlife Service (USFWS), and/or state wildlife department representatives for permit requirements and information."
I tried to find information specific to NY, but was unsuccessful. I have 3 or 4 a day around here and I have trained my dog to go berserk when he hears them, but that doesn't stop them from buzzing our yard at a couple hundred miles per hour. It is only a matter of time before one makes off with a bird or two. We have the Harrier and broad winged version lately. I think they could make off with a small kid they are so huge...