Fig. 3From: Species and abundance of ectoparasitic flies (Diptera) in pied flycatcher nests in FennoscandiaMeans and standard errors for the numbers of (a) Ornithomya species and (b) Protocalliphora azurea puparia in the nests of F. hypoleuca at sampling sites (sorted from south to north; see Fig. 1). Sample sizes are shown in Table 1 Back to article page