  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.
In the list of the most dangerous creatures in the world, it is unlikely to find a bird among the top 10 in the listing. Well, this may not be a reason to state that birds are not dangerous. Most people regard birds as friendly but it is only correct to say that most of the birds out of the 10,000 available birdsâ species are not harmful in any way. Again, it is important to state that there are dangerous birds and here is just a list of top ten dangerous ones.