Why pythons and boas look alike

For two different families of snake, each has evolved in much the same way according to habitat. Amy Middleton reports. 

Have Burmese Pythons Expanded Their Range in Florida?

Pythons & Boas Evolved Independently To Share Similar Traits

Differences Between Ball Pythons And Boas - XYZReptiles

University of Florida researchers find geneti

Not at all familiar with boa morphs - help please? - Boa Constrictors - MorphMarket Reptile Community

How a boa constrictor's deadly embrace works

Which is bigger, Boa or Python? - Quora

And I Think to MyselfWhat A Wonderful World.: Green Tree Python and Emerald Tree Boa.

Who let the snakes out – and what should you do if you find one in your bed?, Pets

Snake Evolution - Science Update