Okay, I have had more time to clarify my thoughts. Besides pecking on one of those cell phone keyboards is murder. (See what I did there? "Pecking" as in beaks and "murder" as in a murder of crows! Get it!?)
Most of these ideas can be done just by having a Summoned or Follower corvid. I'm just playing with the concept.
The Messenger Crow power could also be Usable By Other and Extra Time to represent transit time between the Corvid Mage and his intended recipient. The recipient could then, in turn, send back another message. I would probably use Time Limit or perhaps a Continuing Charge or something to limit how many trips back and forth the crow would make. In the case of a Summoned crow, I believe there is a maximum number of services rendered and each message would be a service.
Carrier Crow could also be Telekinesis. It would take some tweaking, but would work.
A couple of others.
Some most are silly and some one not. Hopefully all useful.
Murder of Crows (not just great for puns and bad, bad jokes): 1/2d6 RKA, AoE: Radius, Constant, Penetrating. The Physical Limitation, in this case, represents an entire murder of crows pecking at somebody. I'd be willing to accept, were it my campaign, Difficult to Dispel purchases as extra Body to represent the number of individual birds within the murder.
Eat Crow: 1/2d6 RKA, AVAD (Resistant Protection Covering Mouth or not having a Mouth orifice), All or Nothing, Constant, plus Change Environment: Suffocation (season Power Modifiers to taste).
Inspired by...NSFW or anybody squeamish
. Yes, the exact orifice is different. I am aware of that. That doesn't work as well with the cheesy name though.
And finally (thankfully)....
Crow Magnon: Summons a huge crow upon which the Corvid Mage and his companions can safely ride. Flight, Usable Simultaneously, Time Limit (or Continuing Charge) blah blah blah
Storm Crow: Creates a storm (Change Environment and a whole slew of complimentary powers)
I had fun tinkering with the concepts in my head anyways. Usually I am not silly or full of puns when I design stuff. The mood just hit me.
Other (non-named) suggestions: Darkness (could added to Murder of Crows) to represent all of the flapping wings. Flash vs Sight (same basic effect, but just a single crow and only for a second).
Of course, Corvid Mages have to be on the lookout for....wait for it.....Scarecrows (Striking Appearance to cause fear coupled with PRE drain)!
OK. I'm done here.