Okay, I tried on different illusions and conned an aviak rook in South Karana (I have come to realize that the aviaks in Lake Rathetear are on the same faction as the aviaks in South Karana). I am playing a half-elf agnostic bard. Using various illusions, below lists how the aviak rook conned to me. This character has never killed an aviak (in any zone).
The following races con the aviak as Dubious:
half-elf, earth elemental, fairy, kobold, Guktan (the playable race), froglok (the mob/NPC race), goblin, skeleton, gnome, vah shir, dark elf, barbarian, human
The following races con the aviak as Apprehensive:
wood elf, halfling
The following races con the aviak as Indifferent:
dwarf, iksar, erudite
The following races con the aviak as Threateningly:
ogre, troll
When I get a chance, I'll whip up some high elf illusion potions and try out that race as well.
-- Ainulindalex, 71 Half-Elf Bard of Povar (formerly Quellious)