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Monarch butterfly

Find out how a beautiful butterfly can be so dangerous...

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Monarch butterfly

  1. 1. Beautiful but deadly : Monarch Butterflies • Rania Berrada 1
  2. 2. Life cycle 1. The Egg • Laid on milkweed plant • Eggs hatch into larvae in about four days 2. The caterpillar • Eats only milkweed leaves • Milkweed is poisonous • The caterpillar stage is 2 weeks long 2
  3. 3. Life cycle 3. The Pupa • Forms a silk cocoon : The chrysalis • Forms wings and adult organs. • Pupa stage 2 weeks Link to video of caterpillar creating chrysalis 3
  4. 4. Life cycle 4. The Butterfly • Dries it’s wings and makes them strong. It can fly now. • Short life: about 2 to 6 weeks long. • Adults feed on nectar from flower BUT poison remains in their body The whole life-cycle 4
  5. 5. The great migration • From Canada and the US to Mexico. • Hibernation. • Fly back when spring comes. 5
  6. 6. The poison • What does milkweed contain that makes it poisonous ? Cardenolide • A form of a steroid (cyclic organic compounds) • Cardiac arrester • Poisonous to most vertebrates Click on the image to get further information about the chemical structure of cardenolide. 6
  7. 7. Defense against predators • Caterpillar : black white and yellow bands • Butterfly : orange and black coloration Warning of poisonous characteristics and the bitter taste !! 7
  8. 8. Cardenolides as medecine • Similar to digitalis (used for heart problems) • Treat congestive heart failure • The force of muscle contractions increases Should not exceed the stated dose !! 8
  9. 9. Interaction with human being • Can’t kill humans. Still can run after a beautiful Monarch Butterfly … • However, the plant is dangerous. • Extremely dangerous to the eye, can cause blindness Don't eat them ! (Just in case…) 9
  10. 10. Resources Books : • Monarch Butterfly, Volume 1 by David M. Schwartz • Monarch Butterfly Biology & Conservation (Page 55) by Karen Suzanne Oberhauser Internet links : • Interactions with Milkweed • Monarch butterfly life cycle 10
  11. 11. Contacts Contact me : • Rania Berrada: engineering student in TELECOM Saint Etienne • E-mail: rania.berrada(At)telecom-st-etienne.fr • Web page: telecomAcademy Contact a professional : • MONARCH WATCH : Dedicated to Education, Conservation and Preservation • Website: http://www.monarchwatch.org/ • E-mail: monarch(At)ukans.edu • THE MONARCH MAGIC CO: Jenny and Jon Hobson • Website: http://www.monarchmagic.com • E-mail: monarchmagic(At)hotmail.com 11
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