  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.
Confidence votes 135. The Andean Condor is the biggest bird of prey. It's wingspan is about 10 ft. long and weighs on average about 24 pounds. The Wandering Albatross has the longest wingspan, reaching up to 12 feet. And the kori bustard in Africa is the heaviest flighted bird, with some reaching up to 40-42 pounds. The largest bird alive today is a male ostrich, but they don't fly.