Bog Fritillary (Boloria eunomia)

next page           back to list

2016 photographs highlighted in green. Click on any photograph to go to an enlarged picture, or simply scroll down the page.

16155_male_Nièvre_14Jun09

15985_female_Nièvre_13Jun09

37533_female_Nièvre_11Jun15

 

16093_male_Nièvre_13Jun09

16048_female_Nièvre_13Jun09

 

A wetlands species which is closely related to the Small Pearl-bordered Fritillary (B. selene), which it resembles and with which it often flies in company. It is now very restricted in its range, occurring in France only in the Pyrénées, the Morvan (in central France), and the peat bogs of northern France near the Belgian border. In the rest of Europe, it occurs in Scandinavia and the Swiss/Austrian Alpes. The male is rather more delicately marked than selene and the female is slightly suffused in a similar way (although to a lesser extent) to the Mountain Fritillary (B. napaea). The underside is similar to selene in terms of patterning but the post-discal series of spots is solid in selene and unfilled circles in eunomia. The books describe and illustrate the colouring a creamy-white, although in these specimens it is clearly white, making for a strong contrast with the orange sections.

These photographs were taken at the end of the flight period and all of these specimens are quite worn and the photographs do not do eunomia justice. The wetland habitat is also quite difficult terrain and so most of these photographs are distance shots.

 

It is a species tied, almost glued it seems to me (based on a visit to one site), to the larval hostplant Bistort (Polygonum bistorta), in much the same way as the Violet Copper (Lycaena helle), although eunomia never seemed to leave it whereas helle at least rested in nearby bushes. I noticed that a spiders web in the middle of the colony had six or more dead eunomia wrapped up in it; I don't often interfere in nature, but needless to say the web no longer exists.

ref sex

observations

alt. m
16155 M

a male.

620
15985 F

a female, the dullish suffusion making it look quite dark.

620
37533 F a rather dark female, showing some signs of wear at the end of its flight period. 620
16093 M

a male underside.

620
16048 F

a female underside.

620

 

16155_male_Nièvre_14Jun09

 

15985_female_Nièvre_13Jun09

 

37533_female_Nièvre_11Jun15

 

16093_male_Nièvre_13Jun09

 

16048_female_Nièvre_13Jun09