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Entomology

Entomology. The study of the most successful creature on Earth!. Fun Facts. One million species have been discovered/described Approximately 20 million species are still undiscovered. What’s the Big Deal?. Why do we need insects? Pollination (no fruits & few flowers) Eat Dead Animals

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Entomology

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  1. Entomology The study of the most successful creature on Earth!

  2. Fun Facts • One million species have been discovered/described • Approximately 20 million species are still undiscovered

  3. What’s the Big Deal? Why do we need insects? • Pollination (no fruits & few flowers) • Eat Dead Animals • Food Supply • Help Wood Decay • Loosen Soil

  4. Life Cycle - Metamorphosis

  5. Body Structure 3 pairs of legs Head Thorax Abdomen * 0,1,2 pairs of wings *cold-blooded

  6. Senses • Bodies are compact so many sense organs do more than one thing. • Some insects find nectar with the bottom of their feet. • Katydids have ears on their legs.

  7. Compound Eyes • Thousands of lenses, each lens points in a slightly different direction. • Allows the eye to see in thousands of directions.

  8. Communication - Signals • Recognized by other species • See, hear, smell, feel, taste • Might be a warning

  9. Communication - Messages • Meant for only members of the same species • Sent by tapping, flashing, chemical odor or “singing & dancing” Examples: • Female moths send out chemical signal to find a mate • Fireflies flash their lights • Honeybees do a dance for how far food is

  10. Social Insects • Colonies can contain thousands & thousands All have 3 things in common: • Adults cooperate to care for the young. • Different members of the group are responsible for different jobs. • Each group has at least ONE queen*. *Queen-produce young, may live many times longer than workers, sends chemical messages to control the colony.

  11. Swarm Examples

  12. People & Insects - Harmful • Called pests • Destroys plants & crops • Killed with pesticides & insecticides • Now using other insects to control insect populations (i.e.-ladybeetles eat aphids)

  13. People & Insects - Harmful

  14. People & Insects - Helpful • Silkworms (caterpillar of silk moth) give us silk. • Bees provide pollination & honey. • High in protein for a food source. • We might find new chemicals & medicine from insects.

  15. Forensic Entomology • Timeline of activity called postmortem interval.

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