The Tasmanian Devil is an iconic, and charismatic species that lives on the Island of Tasmania off the coast of Australia. Reports started 1996 of Tasmanian Devils with large facial and neck tumors. The cancer is transmitted through an infected individual by biting a healthy individual. Due to the Tasmanian Devil’s tendency to fight, and bite each other over territory, food and sex the tumors are passed fairly quickly through populations. The tumors begin to proliferate and can prevent the Tasmanian Devil from breathing, and eating; however, it may take time for the tumors to get large enough to do kill the infected individual giving the cancer plenty of time to get passed on. The tumors are killing many Tasmanian Devils and certain populations throughout Tasmania have been reduced more than 90% in the last 20 years and is now considered endangered.
Comments
Comment
For the last sentence you can delete the first few words and start off like, "Certain Tasmanian Devil populations across Tasmania have been reduced to more than 90% in the last 20 years resulting in being considered an endangered species."
Comment II
The comma and the word and are redundant pick only one
Wording
I would avoid using words like "plenty" and instead say that there is sufficent time for the tumor to spread between individuals before succubming to the symptoms or something like that. I would also note that "reports started 1996" seems awkard and I would instead say that since 1996 there have been repors of neck tumors, or something along those lines.