Animal Messenger is… weird. I get the intent, that druids are meant to actually call over an animal and tell it to carry a message. But at the same spell level, Bards and Sorcerers/Wizards get Whispering Wind which puts a message in actual controlled air. Assuming that Animal Messenger’s range is a range for finding an animal, rather than the range of the spell, it does have duration and speed over Whispering Wind, if you can find a hawk. But honestly, it should work a bit more like the message function of the Patronus charm from Harry Potter.
Level: Drd 2
Components: V, S
Casting Time: 1 standard action
Range: 1 mile/level
Duration: 1 day/level
Saving Throw: None
Spell Resistance: No
The druid conjures an animal of magical energy, and gives it a message of up to 25 words, or a scroll to carry, then sends it to a designated location. The animal messenger travels to a specific location within range that is familiar to you, provided that it can find a way to the location. The messenger travels quickly, up to 20 miles in an hour, the top speed of a hawk, without regard to terrain, through the air, however it can be stopped and trapped. If it cannot find the intended recipient, it will leave any scroll it was given to carry, or return to the caster (if able) if given a verbal message to convey.
The messenger cannot activate command words or cast spells with verbal components, but verbal messages will trigger effects which would be triggered by someone speaking near them. If given a verbal message to convey, the messenger speaks in the voice of the caster. The messenger is immune to damage, but can be destroyed with a targeted dispel. The caster knows if their messenger has been dispelled, but not if the messenger managed to deliver the message.