I was looking around on ui.worldofwar.net, and found this
http://ui.worldofwar.net/macros.php?id=52
Code:
/script a=UnitCreatureType('target'); if "Dragonkin"==a then CastSpellByName("Track "..a); end; if "Undead"==a then CastSpellByName("Track "..a); end; CastSpellByName("Track "..a.."s")
Im still not entirely sure what this does. Looks like its a tracking macro though. If it DOES let you track anything, AWSOME. But by reading it (im not so good with code) it looks like it could single out mobs that you already have the tracking ability for (like that rare spawn youve been trying to find).