Haemoproteus columbae is a red-blood cell protozoon parasite of pigeons and doves. The pathogenicity of H. columbae is generally low and adult birds usually show no evidence of disease (Soulsby, 1986; Rommel et al., 2000). However, an acute form of the infection-has been reported in pigeon nestlings, in which heavy mortality has been recorded (Soulsby, loc. cit.). The frequency of H. columbae is considerably high in. pigeons worldwide (Mushi et al., 2000). There are very limited number of studies on blood parasites of pigeons in Turkey (Gulanber et al., 2002). This study was therefore designed to determine the prevalence and intensity of this parasite in domestic pigeons fro m Bursa region, Turkey during a one year period.