So in summary you still haven t provided a reference to support you claim and instead of making a minor correction you still prefer to just remove everything Secondly if you in the above comment was aimed at me please note that I was not the original author of the sentence you ll have to check history for that I only added the citation needed tag I have now re inserted the sentence but with a slight change in wording that hopefully will resolved the potential confusion over popular vs common I have also added a sentence to the main section using the reference provided by Kurt Shaped Box above As was pointed out by Casliber in his last edits to the page there is a general attempt of restricting ref s in leads since all info in leads should be supported by ref ed info in the main sections of the article WP LEADCITE The only sentence that was not clearly supported by ref ed info in the main part of the article was the one about the Cockatiel hence my addition of a sentence specific to that case Finally please do remember to sign your comments comments on all talk pages should be signed That s done by ending the comment with four tiles