  Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals,[1] making up about 25% to 35% of the whole-body protein content.I â¦ t is naturally found exclusively in metazoa, including sponges. [2] In muscle tissue it serves as a major component of endomysium. Collagen is the main protein of connective tissue in animals and the most abundant protein in mammals,[1] making up about 25% to 35% of the whole-body protein content.
The Southern Cassowary - The Most Dangerous Bird on Earth. Sunday, 1 September 2013. Ask a ten year old what the largest bird in the world is and the chances are you will get the right answer â the ostrich. Asked about the second largest and the odds are still very good that they will be able to name the Emu.
Top 10 Black Birds. Weâve done this before, with the Top Ten White Birds, and thought it would be fun to do it a second time. It is our humble opinion based on our small vault of bird knowledge that these are the top ten black birds.Here they are in no particular order: 1.American Crow â Since it is the year of the crow, this smart corvid is our top black bird. They are obvious and loud, and sometimes an alert to a large hawk or owl.t is our humble opinion based on our small vault of bird knowledge that these are the top ten black birds. Here they are in no particular order: 1. American Crow â Since it is the year of the crow, this smart corvid is our top black bird. They are obvious and loud, and sometimes an alert to a large hawk or owl.