How do scientists classify fish and birds?

  

   
                               http://www.sciencekids.co.nz/images/pictures/animals/baldeagle.jpg

Birds have feathers.  They build a nest in a tree. 

http://www.sciencekids.co.nz/pictures/animals/clownfish.html

    Fish live in water.  Fish have a backbone. They are vertebrates.
Fish breathe using gills.  Some fish have scales.

Fish Video on YouTube 

https://www.youtube.com/watch?v=p2MoXON8lNI  


Standard 2.L.5A.1   How can you classify animals?