Nigel Cattlin / Bird cherry-oat aphid (Rhopalosiphum padi) infestation on Wheat (Triticum aestivum) leaf with Barley yellow dwarf virus (BYDV) symptoms present.

Doug Wechsler / Brown lacewing (Hemerobiidae) larva feeding on Oleander Aphid (Aphis nerii) Philadelphia, USA, June.

Doug Wechsler / Brown lacewing (Micromus sp) larva eating Oleander aphid (Aphis nerii) on common milkweed, USA.

Doug Wechsler / Oleander aphids (Aphis nerii) on common milkweed, Schuylkill Centre for Environmental Education, Philadelphia, USA July

Doug Wechsler / Oleander aphid (Aphis nerii) Morris Arboretum, Philadelphia, USA October

Doug Wechsler / Milkweed / Oleander aphids (Aphis nerii) on common milkweed (Asclepias syriaca). Philadelphia, PA. August

Nigel Cattlin / Hoverfly (Episyrphus balteatus) feeding from the red flower of a long-headed poppy, (Papaver dubium), Berkshire, July

Nigel Cattlin / Damage to the leaves of a Currant (Ribes sp.) caused by Currant blister aphids, (Cryptomyzus ribis) in summer. The leaves are puckered with yellow blisters from feeding pests. Berkshire, England, UK.

Nigel Cattlin / Damage to the leaves of Currant (Ribes sp) caused by currant Blister aphids (Cryptomyzus ribis) in summer. The leaves are puckered with red and yellow blisters from feeding pests. Berkshire, England,...

Nigel Cattlin / Damage to the leaves of a Currant (Ribes sp.) caused by currant blister aphids (Cryptomyzus ribis) in summer. The leaves are puckered with red and yellow blisters from feeding pests. Berkshire, Englan...

Premaphotos / Yellow-rimmed icon hover fly (Metasyrphus corollae) female laying her eggs amongst Lupin aphids, on which her larvae will prey, UK

Doug Wechsler / Oleander aphid (Aphis nerii) alates and nymphs on Common milkweed (Asclepias syriaca) leaf, Pennsylvania, USA. July.