1. Bird Beak Lab
Who will survive?

2. Problem?
How did the finches on the Galapagos Islands all end up with different shaped beaks?

3. Problem?
Which bird beak is best suited for eating worms?______________
Which bird beak is best suited for eating bugs? ______________
Which bird beak is best suited for eating fruit? ______________
Which bird beak is best suited for eating seeds? _____________

4. Skip a few lines to add more information in a minute!
Hypothesis
FINISH THE STATEMENT BELOW.
If the finches on each island all have different beak shapes, then they got that way because…
Skip a few lines to add more information in a minute!

5. Materials Clamps Forceps Probes Spoons Fish Crawlers Pretzels Skittles
Paper Plate
Cups
Calculator
Time keeper
Tray/Box

6. Procedure
Choose a beak type from the tray given in your group. Use the cup to represent the bird’s stomach. Use the utensils appropriately.
When the signal is given, you will have 15 seconds to try to put as much food as possible into the bird’s stomach. PUT ONLY ONE FOOD ITEM AT A TIME. DO NOT USE YOUR HANDS TO TOUCH THE FOOD!
Count and record the amount of food on Data Table I for the beak type.
Calculate individual average.
Calculate Class average with similar beak types.
Graph your results. You are graphing the Bird Beak type and the class averages of food eaten. See sample graph.

7. Create the data table below on your paper
Create the data table below on your paper. Record the amount of food eaten by each beak for trials 1-4.
Beak Types
# of Worms (crawlers)
Class Average
# of Bugs (pretzels)
# of seeds
(skittles)
# of fruit
(fish)
Clamps 1. 2. 3. 4.
Average=
Forceps
Chopsticks
Spoon

8. Graph

9. Analysis Clamps Forceps Probes Spoon Beak Type
Food best adapted to eat
Calories eaten with best food source
Did it survive with best food source?
Did it reproduce with best food source?
Clamps
Forceps
Probes
Spoon

10. Conclusions
How did variations in bird beak types affect survival of the birds?_______________________ ________________________________________________________________________
How is this lab an example of evolution by natural selection?____________________________ __________________________________________________________________________________________________________________________________________________