Darwin's spot the difference

Spot the difference.

Follow the weblink and watch the video. Can you spot the difference in the six different species of Finch found by Charles Darwin?

• Why do you think the different species have different shaped beaks?
• Molecular evidence indicates that the single ancestor species of the finches arrived in the Galápagos Islands between 2-3 million years ago. Since that time, these volcanic islands have undergone many changes in sea level, elevation and climate. What selection pressures might the finches have faced?
• The HMS Beagle team collected thousands of specimens of plants and animals during their expedition. Why did they do this?