Natural History Photographs

Diptera - Muscomorpha - Empidoidea

Argyra spec.
Amstelveen, the Netherlands;
18 April 2009.
Amstelveen, the Netherlands;
13 May 2007.

Dolichopus spec.
Amstelveen, the Netherlands; 24 & 23 May 2010.

Hercostomus nigripennis
Aekingerzand, the Netherlands; 30 July 2010.

Liancalus virens
Amsterdam, the Netherlands; 7 May 2017.

A species from fast-flowing rivers and springs. More recently, it is also found in cities especially around artificial structures which have a continuous vertical flow of water over solid substrates. The fountain of Frankendael park in Amsterdam provides exactly this habitat.

Medetera spec.
Hoogersmilde, the Netherlands;
14 May 2010.

Neurigona quadrifasciata
Amsterdamse Waterleidingduinen, the Netherlands; 24 May 2009.

A considerable number of these flies were constantly flying around a large Poplar trunk. Upon meeting a resting fly, the males started courtship behavior; occasionally, this was directed towards another male (top left). A courting males stand high on his legs, and his wings vibrate; he moves the front legs in large arcs such that the the broadened distal ends of the tarsi move around the female's head, as if to mesmerize her (top right). After some time (approximately 10 seconds), the male starts to descend (bottom left); during descend, he puts the broadened patches of the tarsi at the wing base of the female (bottom middle). Finally, when the male's head is below the female's wings, the male bends his abdomen upward, and tries to contact the females genitalia, to couple with her (bottom right). I didn't see any successful attempt though.

Poecilobothrus nobilitatus
Amstelveen, the Netherlands; 16 June 2007.