Many logo developers getting ideas from the nature. Logo with birds is one of the most popular element. They integrate bird as a whole or its wing or just its shadow. Here is a small collection of birds logos. Most of these logos can be found in logopond.com
I am a part-time designer from Canada. I have more than 3 years of experience in designing field. I love sharing my thoughts and shaping my thoughts with others. Apart from this, I do logo designs for companies. If you are interested in logo designs, you can contact me.