. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT. NAT. HIST., 2: 1989. Fig. 3. 10 km sq map showing the total number of the eight butterfly species in "risk" categories 0 to 2. For symbols see Fig. 1 The heath fritillary does not show any correlation (positive or negative) in this analysis. The total number of squares involved in the analysis is very low for this species — probably too low for this crude form of analysis to be of any use. The evidence discussed in the first section of this paper does, though, suggest that pheasant predation
. British journal of entomology and natural history. Natural history; Entomology. BR. J. ENT. NAT. HIST., 2: 1989. Fig. 3. 10 km sq map showing the total number of the eight butterfly species in "risk" categories 0 to 2. For symbols see Fig. 1 The heath fritillary does not show any correlation (positive or negative) in this analysis. The total number of squares involved in the analysis is very low for this species — probably too low for this crude form of analysis to be of any use. The evidence discussed in the first section of this paper does, though, suggest that pheasant predation could be important. The Duke of Burgundy (Hamearis lucina) is one species which does not fit this hypothesis. Its biology suggests that it should be susceptible to pheasant predation in wood and wood-edge habitats and yet it shows some positive correlation between high pheasant density and survival. It is a rapidly declining species and survives best in non-woodland habitats. Recent surveys show that it has disappeared from virtually all its woodland haunts and survives mainly on 'poorly grazed calcareous grassland' (Heath & Emmet, 1989) which may explain this anomaly. I predict that, in studies at a more local level than 10 km squares, this species will be shown to survive better in low pheasant density woodlands. If this prediction is shown to be false it will be an excellent argument against my Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Entomological and Natural History Society. [London] : British Entomological and Natural History Society
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