David Maitland / Close-up view of the upward-looking giant dorsal compound eyes of the St Marks fly (Bibio marci) used to detect female flies flying above. Like many insects the eyes are "hairy". Feltwell, Norfolk, UK...
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David Maitland / Close-up view of the upward-looking giant dorsal compound eyes of the St Marks fly (Bibio marci) used to detect female flies flying above. Like many insects the eyes are "hairy". Feltwell, Norfolk, UK...
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David Maitland / Head of female St. Marks fly (Bibio marci) showing normal sized compound eyes. Feltwell, Norfolk, UK
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David Maitland / Head of female St. Marks fly (Bibio marci) showing normal sized compound eyes. Feltwell, Norfolk, UK
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Nick Upton / Sexually dimorphic St. Mark's fly / March fly (Bibio marci) pair mating; males have much larger eyes and clear wings, Wiltshire garden, UK, May.
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Andy Sands / St Mark's Fly (Bibio marci) mating pair on grass stem, West Sussex, England, UK, May
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Nick Upton / Female St.Mark's / March Fly (Bibio marci) feeding on Alexanders (Smyrnium olusatrum) flowerhead on coastal cliff overlooking Camel esturary and Atlantic sea. Trebetherick, Cornwall, UK, April.
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Guy Edwardes / 2020VISION / March / St. Mark's flies (Bibio marci) Street Heath SWT reserve, Somerset Levels, England, UK, April
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Kim Taylor / St Mark's fly / March fly {Bibio marci} on Gorse flower, UK.
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Kim Taylor / St Mark's Fly (Bibio marci) male resting on leaf, UK.
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Michael Hutchinson / March / St Marks fly {Bibio marci} UK.
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Michael Hutchinson / March / St Marks flies {Bibio marci} UK.
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Premaphotos / March / St. Mark's fly (Bibio marci) mating pair, large-eyed (holoptic) male on the right, UK
