A total of 24.752 larvae consisting of fourteen mosquito species (Aedes vexans, Anopheles hyrcanus, An. maculipennis s.s., Culex deserticola, Cx. laticinctus, Cx. martinii, Cx. mimeticus, Cx. modestus, Cx. pipiens, Cx. theileri, Cx. territans, Cx. tritaeniorhynchus, Ochlerotatus caspius and Oc. dorsalis) were collected from permanent and temporary breeding areas in Igdir plain (Ararat Valley) from July through October, 2005 and April through October, 2006 periods. The most dominant species was Oc. dorsalis (33.69% of total catch) followed by An. maculipennis s.s. (23.02%), Ae. vexans (15.19%), Cx. theileri (11.3%), Oc. caspius (10.33%) and Cx. pipiens (2.25%). Except Oc. caspius, all of the species could be sampled in permanent breeding areas. On the other hand, only five species (Oc. dorsalis, Ae. vexans, Oc. caspius, Cx. theileri and An. maculipennis s.s.) were found in temporary breeding areas. The ratio of An. sacharovi in Maculipennis complex was 6.5% in Igdir plain.