Bibio marci (Linnaeus, 1758)
(St Mark’s Fly)

Taxonomic hierarchy:
SpeciesBibio marci (St Mark’s Fly)
GenusBibio (St Mark’s flies)
FamilyBIBIONIDAE (St Mark’s flies, fever flies)
SuperfamilyBIBIONOIDEA (St Mark’s flies, fever flies)
InfraorderBibionomorpha (St Mark’s flies, fever flies)
SuborderNEMATOCERA (thread-horned flies, gnat)
OrderDIPTERA (two-winged flies)
Division Endopterygota (bees, beetles, flies, moths and other insects with wings developing internally)
InfraclassNeoptera (bees, beetles, flies, grasshoppers, moths and other advanced insects)
SubclassPTERYGOTA (bees, beetles, dragonflies, flies, grasshoppers, moths and other winged insects)
ClassINSECTA (true insects)
SubphylumHEXAPODA (insects and other 6-legged organisms)
PhylumARTHROPODA (arthropods)
SuperphylumECDYSOZOA (skin shedders)
CladeBilateria (bilaterally symmetrical animals)
SubkingdomEUMETAZOA (metazoans)
KingdomANIMALIA (animals)
DomainEukaryota (eukaryotes)
LifeBIOTA (living things)
Records of Bibio marci (St Mark’s Fly) :
1: Bibio marci (St Mark’s Fly)
26 Apr 2018 OSGR: SU00 50° 50’ N, 1° 50’ W Vice County: Dorset (VC 9) England
Male, at MV light sheet
Image 1: Male - dorsal view - enlarged - silver backgroundImage 2: Male - fore-legs, head and thorax - dorsal view - highly enlarged - silver backgroundImage 3: Male - fore-tibia, head and thorax - dorsal view - highly enlarged - silver backgroundImage 4: Male - lateral view - enlarged - silver backgroundImage 5: Male - ventral view - enlarged - silver background
2: Bibio marci (St Mark’s Fly)
4 May 2012 OSGR: SY58 50° 40’ N, 2° 40’ W Vice County: Dorset (VC 9) England
Feamle, climbing up cut-off stem of Hemlock Water-dropwort
Image 1: Female - wings apart - dorsal view - white backgroundImage 2: Female - wings half apart - dorsal view - white backgroundImage 3: Female - wings together - dorsal view - white backgroundImage 4: Female - head and fore tibiae - antero-dorsal view - highly enlarged - white backgroundImage 5: Female - head and fore tibiae - lateral view - highly enlarged - white backgroundImage 6: Female - lateral view - enlarged - white backgroundImage 7: Wing - highly enlarged - white background
3: Bibio marci (St Mark’s Fly)
28 Apr 2012 OSGR: SU17 51° 30’ N, 1° 50’ W Vice County: North Wilts (VC 7) England
male, resting on Ash trunk in cold, drizzly weather
Image 1: Male - dorsal view - white backgroundImage 2: Male - dorsal view - white background (2)Image 3: Male - lateral view - white backgroundImage 4: Male - ventral view - white backgroundImage 5: Male - head - dorsal view - magnified - white backgroundImage 6: Male - head - lateral view - magnified - white backgroundImage 7: Wing - highly enlarged - black backgroundImage 8: Wing - highly enlarged - white backgroundImage 9: Wing - highly enlarged - white background (2)Image 10: Fore tibia - dorsal view - microscope low magnification - white background
4: Bibio marci (St Mark’s Fly)
6 May 2006 OSGR: SY59 50° 50’ N, 2° 40’ W Vice County: Dorset (VC 9) England
resting on lichen on oak
Image 1: Male - dorsal view - close-up
5: Bibio marci (St Mark’s Fly)
26 Apr 2004 OSGR: SU56 51° 20’ N, 1° 10’ W Vice County: Berks (VC 22) England
Image 1: Male - dorsal view - enlargedImage 2: Male - lateral view - enlargedImage 3: Male - lateral view - enlarged (2)
6: Bibio marci (St Mark’s Fly)
25 Apr 1998 OSGR: SU67 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
in flight
Image 1: Female - ventral view - white backgroundImage 2: Male - dorsal surface - black backgroundImage 3: Male - dorsal view - grey backgroundImage 4: Male - dorsal view - white backgroundImage 5: Male - lateral view - grey background
7: Bibio marci (St Mark’s Fly)
25 Apr 1998 OSGR: SU67 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
landed on Broad Buckler Fern
Image 1: Female - dorsal view - black backgroundImage 2: Female - dorsal view - white backgroundImage 3: Female - dorsal view - wings closed - grey backgroundImage 4: Female - lateral view - grey backgroundImage 5: Female - ventral view - white background
8: Bibio marci (St Mark’s Fly)
4 May 1997 OSGR: SU57 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
at MV
Image 1: Male - dorsal view - white background
9: Bibio marci (St Mark’s Fly)
18 May 1975 OSGR: SU57 51° 30’ N, 1° 10’ W Vice County: Berks (VC 22) England
Female
Image 1: Female - lateral view - enlarged
10: Bibio marci (St Mark’s Fly)
15 May 1972 OSGR: SE75 53° 60’ N, 0° 50’ W Vice County: South-east Yorks (VC 61) England
Male
Image 1: Male - lateral view - enlargedImage 2: Male - latero-dorsal view - enlarged
11: Bibio marci (St Mark’s Fly)
15 May 1972 OSGR: SE75 53° 60’ N, 0° 50’ W Vice County: South-east Yorks (VC 61) England
Mating pair
Image 1: Mating pair - enlarged

Bibio marci (St Mark’s Fly) may be included in identification literature listed under the following higher taxa:

NBNNBN (data.nbn.org.uk) has a distribution map for Bibio marci (St Mark’s Fly)
BioInfoBioInfo (www.bioinfo.org.uk) has 0 host/parasite/foodplant and/or other relationships for Bibio marci (St Mark’s Fly)
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