A shield bug, to your left, and a green fly, to your right, actually do not like one another at all.
The Pentatomidae (shield bugs), some of which are metallic or otherwise brightly coloured, are easily recognized by the great development of the scutellum, which reaches at least half-way back towards the tip of the abdomen, ...
Those species whose hard upper covering, or scutellum, covers most of the abdomen are known as shield bugs. An unpleasant-smelling secretion is emitted from two glands on the thorax and remains on whatever the bugs visit.
Observation by naturalist: captive adult female consumed 20 grasshoppers, 11 katydid, 7 shield bugs and stink bug, and 3 spiders at a single feeding (King 1931) ...
The term bug is often used used to describe insects, spiders, centipedes and a whole range of other arthropods, but true bugs or Hemiptera actually only includes things like aphids and shield bugs. True bugs all have very unusual mouthparts.
Green shield bug (Palomena prasina)
Water scorpion (Nepa cinerea)
Harlequin bug (Lygaeus equestris)
Black bean aphid (Aphis fabae)
Water boatman (Notonecta glauca)
Madagascan flatid bug (Phromnia rosea) ...
Speckled Bush-cricket ( Leptophyes punctatissima )
Squash Bug ( Coreus marginatus )
Striped Shield Bug ( Graphosoma lineatum )
Two-spotted Lady Beetle ( Adalia bipunctata )
White-legged Damselfly ( Platycnemis pennipes ) ...
 See also: Cicada, Nymph, Aphid, Skate, Beetle
  
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