We see many Swainson’s nests with local red-tails near them early in the year.
You might visit that site to determine whether or not the hawk in question is actually a Swainson’s. If so, March 12 is probably a record for early arrival.
Let me know. We appreciate your interest and good observations/photography of this species!
Conservation Research FoundationI have not yet seen any of the Hawks or been able to photograph one. I would like to ask any of the neighbors who see the hawks again to try to get a positive ID and a picture if possible.
FYI, Here are links to photo ID sites for Red Tail Hawks and Swainson's Hawks from the Cornell Lab of Ornithology/ All About Birds web site.