20PredPar - Announcements Parasitoid attack on aphids E x a...

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1 Announcements Exam 3- submit corrections to me Deadlines Lab Quiz Monday May 12 Insect collection May 14 Field Journal May 12 Parasitoid attack on aphids Insects as endoparasites Order Stresiptera • Few hundred exclusively parasitic species • Feed mostly on hemiptera and hymenoptera • Can switch or sterilize hosts Strepsiptera photos Insect Defenses Crypsis Camouflage Masquerade Self Startle Display Mechanical Chemical Insect Defenses
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2 Crypsis : Camouflage • Insect resembles background • Can avoid predation and/or aid in prey capture Midwestern grasshopper Crypsis : Masquerade Insect resembles object that is of no interest to predator. Leaf mimic katydid Dead leaf mimic Startle Display- cryptic prey suddenly reveals eye shaped structures
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3 Eye spots on wings Mechanical Defense Mechanical Defense Spiny or hard body Retreats (e.g. caddis fly) Limb shedding (crane fly, cricket) Chemical defense Effect Immediate acting
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20PredPar - Announcements Parasitoid attack on aphids E x a...

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