MagisterCultuum
Great Sage
Ravens used to replace Hawks for all Evil civs (except the Balseraphs, who had Parrots). The Sidar also have Ravens.
Here are my guesses and reasons. I doubt I'm right, but here goes nothing:
Snake - Sheaim; the serpent may be the symbol of Agares, but the locusts fit the Infernals too well.
Deer - Ljosalfar; cuddly woodland animal.
Scorpion - Clan of Embers; wild guess
Phoenix - Mercurians; I could argue for the Clan (fire) but the Phoenix seems a perfect symbol of angelic rebirth.
Ram - Khazad; process of elimination, since they sure aren't the scorpion. Plus UU.
Lion - Malakim; they summon sand lions, for crying out loud!
Bat - Calabim; cliched, but I'm going with it anyways.
Elephant - Grigori; stealing Magistar's answer.
Rabbit - Kuriotates; it's so cute and fluffy.
Dog - Bannor; deep dedication to law.
Eagle- Amurites; I dunno, I'm steaing Magistar's answer.
Wolf - Doviello; fairly obvious.
Rat - Lurchiup; I see them as being sort of pack-rats with their magical goodies.
Chimera - Balseraphs; so CRAZY!
Owl - Elohim; I think it's mentioned somewhere or other that they're connected... some 'pedia entry, if I'm not mistaken... I could be wrong, though.
Panther - Svartalfar; dark and shadowy. Plus they ride 'em.
Horse - Hippus; obvious
Raven - I like Sidar for this one.
Whale - Lanun; it swims.
Bear - Illians; obvious.
Locust - Infernals; they destroy everything.
EDIT: Red are the ones I'm 100% confident in. Most are stolen from Magistar, whose list I quoted and re-arranged... but I'd like to add a vote of confidence for the Dog/Bannor. Not as grand as you'd imagine the Bannor symbol being. But it makes sense, IMHO.
Ah, forgot about the free promotions for upgrades. Good catch kenken
My question then since nobody else has grabbed the open floor
What section of the Civilopedia contains the most references to the real world? (ie - Technologies, Units, Heroes, Buildings....)