Alexis Harrison is interested in finding out how important the physical appearance (phenotype) of the dewlap is in the reproductive success of the male brown anole. Alexis is testing the hypothesis that males with more red on their dewlaps will father more offspring than males with less red on their dewlaps. To test this question she is changing the dewlaps of some of the males we will be releasing on the islands. When we return to these islands we will take DNA samples of the new hatchlings to find out how many offspring each male has produced by the end of the season. To change the color of the dewlap she give the lizards tattoos that change the amount of red on the dewlap.