southern brown howler
... that the southern brown howler is considered to be a vulnerable species, partly because of the monkey's susceptibility to yellow fever?
... that the <b id="mwBSg"><a href="./Southern_brown_howler" id="mwBSk" rel="mw:WikiLink" title="Southern brown howler">southern brown howler</a></b> is considered to be a <a href="./Vulnerable_species" id="mwBSo" rel="mw:WikiLink" title="Vulnerable species">vulnerable species</a>, partly because of the monkey's susceptibility to <a href="./Yellow_fever" id="mwBSs" rel="mw:WikiLink" title="Yellow fever">yellow fever</a>?