http://www.nutria.com/site14.php
The invasion of Africanized Honey Bees (Killer Bees)
https://www.youtube.com/watch?v=gstt3XlNXN4
The links above illustrate more reasons to understand the process of evolution by means of natural selection.
For more reasons to understand evolution, the following posts also address the question: Why is Evolution Important Now?
Why Is Evolution Important Now? Understanding Extinction and Our Environment
http://cavalierscience.blogspot.com/2009/03/why-is-evolution-important-now.html
Why Is Evolution Important Now? Disease Prevention
http://cavalierscience.blogspot.com/2009/02/why-is-evolution-important-now-disease.html
Why Is Evolution Important Now? Antibiotic Resistance
http://cavalierscience.blogspot.com/2009/02/why-is-evolutions-important-now.html
Why Is Evolution Important Now? Understanding Diseases and Food Production
http://cavalierscience.blogspot.com/2009/02/why-is-evolution-important-now.html
Why Is Evolution Important Now? Understanding Predation
http://cavalierscience.blogspot.com/2010/07/why-is-evolution-important-now.html
Why Is Evolution Important Now? Battling the Bedbug Epidemic and Cockroach avoidance of bait - Pesticide Resistance
http://cavalierscience.blogspot.com/2011/03/why-is-evolution-important-now-battling.html
Why Is Evolution Important Now? Invasive Species
http://cavalierscience.blogspot.com/2013/05/why-is-understanding-evolution.html
The invasion of Africanized Honey Bees (Killer Bees)
https://www.youtube.com/watch?v=gstt3XlNXN4
The links above illustrate more reasons to understand the process of evolution by means of natural selection.
For more reasons to understand evolution, the following posts also address the question: Why is Evolution Important Now?
Why Is Evolution Important Now? Understanding Extinction and Our Environment
http://cavalierscience.blogspot.com/2009/03/why-is-evolution-important-now.html
Why Is Evolution Important Now? Disease Prevention
http://cavalierscience.blogspot.com/2009/02/why-is-evolution-important-now-disease.html
Why Is Evolution Important Now? Antibiotic Resistance
http://cavalierscience.blogspot.com/2009/02/why-is-evolutions-important-now.html
Why Is Evolution Important Now? Understanding Diseases and Food Production
http://cavalierscience.blogspot.com/2009/02/why-is-evolution-important-now.html
Why Is Evolution Important Now? Understanding Predation
http://cavalierscience.blogspot.com/2010/07/why-is-evolution-important-now.html
Why Is Evolution Important Now? Battling the Bedbug Epidemic and Cockroach avoidance of bait - Pesticide Resistance
http://cavalierscience.blogspot.com/2011/03/why-is-evolution-important-now-battling.html
Why Is Evolution Important Now? Invasive Species
http://cavalierscience.blogspot.com/2013/05/why-is-understanding-evolution.html