four native monkey species
... that Corcovado National Park is the only national park in which all of Costa Rica's four native monkey species can be found?
... that <a href="./Corcovado_National_Park" id="mwA4o" rel="mw:WikiLink" title="Corcovado National Park">Corcovado National Park</a> is the only <a href="./National_park" id="mwA4s" rel="mw:WikiLink" title="National park">national park</a> in which all of <a href="./Costa_Rica" id="mwA4w" rel="mw:WikiLink" title="Costa Rica">Costa Rica</a>'s <b id="mwA40"><a href="./List_of_Costa_Rican_monkey_species" id="mwA44" rel="mw:WikiLink" title="List of Costa Rican monkey species">four native monkey species</a></b> can be found?