I was surprised to be attacked so early in the year. If you're a solo cyclist beware of this aggressive magpie, he let me pass then without warning or sound, then he swooped from behind hitting my head and neck while squawking profusely. This one physically hits you so it may be capable of drawing blood so again, I say, beware.
I rode back via another route to avoid a repeat session. I was attacked last year with this one and it's more aggressive this time, perhaps it remembers me and has a "set" against me for some reason.
I'd ride via Gormans Hill Rd to avoid it in future.