Male perch selection and the mating system of the robber fly
, Promachus albifacies (Diptera: Asilidae).
First Arkansas record of the robber fly
Microstylum morosum (Diptera: Asilidae).
After stabbing the prey with its hypopharynx, the robber fly
injects neurotoxic saliva that immobilizes the prey and also contains proteolytic enzymes that liquefy the prey's tissues, which are then sucked out through the proboscis (Kahan, 1964).
The robber fly
then injects paralyzing saliva and proteolytic enzymes into its victim, and the liquefied contents of the prey are sucked out (Kahan, 1964).
"Our grasslands are vulnerable and the marsh fritillary butterfly is a flagship species that depends on them for its survival; it is under threat and can only be found in small areas of West Wales.We need to get the cattle back onto the fields so they can graze the grass, and then the hornet robber fly
that lives on cow pats can thrive and feed on smaller flies."
Guillemette, Worcester, "Monarch on Clover"; Best of Season (two winners): Carol Morocco, Worcester, "Grasses: Troiano Brookside Trail" and Michael Walker, Cromwell, Conn., "Wood Lily"; Wildlife (two winners): Michael Walker, Cromwell, Conn., "Snapping Turtle" and Anka Ehrhardt, Worcester, "Robber Fly
"; Sanctuary Waters (two winners): Stephen Gehlbach, Amherst, "Troiano Tree" and William Derr, Worcester, "Ice Rising from Broad Meadow Brook"; People in Nature: Lydia Yanis Simoneau, Boylston, "Family Life at Broad Meadow Brook."
While David prepared to capture the shot, a robber fly
arrived and decided to join in.
Some articles that cover robber fly
ovipositon include a superficial description of the eggs (Lavigne 1963a,b, 1964, 1979, 1984; Dennis and Lavigne 1975, 1976a,b,c, 1979; Lavigne and Dennis 1975, 1980, 1985; Dennis and others 1986; Lavigne and Bullington 1984).
Most of the North American robber fly
species from the family Asilidae (experts estimate more than 1,000 different species) have a long wasplike abdomen.
Others seem to be camp followers, such as a species of a robber fly
that preys on the Melanophila beetles.
"Besides chipping and burning all affected trees, other possible controls - birds, parasitic wasps, other beetle larvae, and robber fly
larvae - should also be studied," says Lingafelter.
With big eyes and an even bigger appetite, this robber fly
(right) hunts for bees.