perhaps tschandler should try reading the article. It is not "unsourced", the links to the sources are in the story. Whether you want to accept those sources is up to you. Where do you get the figure of 10,000 breeding pairs from? The northern spotted owl has an estimated wild population of 3000 to 5000 breeding pairs, probably on the lower side of that range, and the species as a whole is in decline everywhere except probably Mexico ironically enough: 80 adult birds from one population is a big deal! The number of 80 in the article is actually "more than 80" - they are rounding it for ease of reading. The actual number allowed to be killed is 83, which is stated to be half of the total number of owls in the area. This doesn't mean the people involved are just going (or even allowed) to go shoot exactly 83 owls, it means this is the number allowed to be killed during the process, same as if permission was granted to kill up to 100 Cute Speckled Newts during construction of a highway: the workers couldn't go stomp directly on 100 newts, but 100 newts are allowed to be killed/de-homed by the construction process.