A 6th Grader
Plymouth Middle School
Robbinsdale School District 281
Plymouth, MN

Abstract

I wanted to know if the females' wings were larger than the males'.  I used the data sheets and recorded wing size of the left and right wings.  I found the average wing size for each sex.  I found the females' wings were both larger and smaller than the males' wings.  I would like to have data from other years to compare with this year's data.  I learned how to tell male monarchs from female monarchs.  I learned that their bright colors signal poison to their enemies.

Hypothesis

I think the females' wings are larger than the males'.

Materials

1. monarch butterflies, males and females
2. data sheet for recording information
3. log book

Results

I found out that there is a difference in size between the left and right wings of a butterfly in both males and females.  I found that the females' right wings are 1 mm larger than the males' on average.  The males' left wings are 2 mm larger than the females' on average.

Conclusion

I learned that of the monarchs we raised this year, the size of the wings for both males and females is almost equal.  I think they are probably like that in nature too.

What I Would Do Differently Next Time

I would analyze data from other classes and other years to see if they are the same or different than what I found for 1998.  I would also plan my time better.  I would like to do something more difficult next time.

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