Ƙungiyar Nazarin Tropical

Ƙungiyar Nazarin Yanayi ta Tsakiya (OTS)/Organización para Estudios Tropicales (OET), wacce aka kafa a shekarar 1963,  ƙungiya ce mai zaman kanta wacce ba ta riba ba wacce ta ƙunshi jami'o'i sama da 50 da cibiyoyin bincike waɗanda ke Amurka, Latin Amurka,  da Afirka ta Kudu. OTS tana kula da hanyar sadarwa ta tashoshin bincike na muhalli a Costa Rica da Afirka ta Kudu. Ofishin Arewacin Amurka yana kan harabar Jami'ar Duke da ke Durham, North Carolina . OTS tana ba da darussa iri-iri a cikin Sifaniyanci da Ingilishi ga makarantun sakandare, jami'a, ɗaliban digiri da ƙwararru. Yawancin darussan da bincike da ake gudanarwa a tashoshin OTS suna mai da hankali kan ilimin halittu na wurare masu zafi, kuma tashoshin bincike guda uku a Costa Rica suna cikin yankuna daban-daban na muhalli. OTS tana ba da gidaje da wurin cin abinci ga ɗaliban masu bincike, da kuma masu yawon buɗe ido na muhalli. OTS tana da hannu a cikin manufofin da suka shafi ilimin halittu na wurare masu zafi ta hanyar darussa, ɗaukar nauyin tarurruka da taruka da kuma gudanar da ayyukan da suka shafi kiyayewa 

Tare da Tashar Halittu ta Cocha Cashu da Cibiyar Koyon Manu a Peru, da Cibiyar Bincike ta Tsakiyar Tsakiyar Smithsonian da ke Tsibirin Barro Colorado a Panama, tashoshin bincike na OTS gabaɗaya (da kuma La Selva musamman) suna ba da wasu daga cikin mahimman wurare da kuma wuraren bincike na asali kan ilimin halittu masu rai.

· Tashar Halittu ta La Selva : dazuzzukan ruwan sama na wurare masu zafi a kan ƙananan yankunan Caribbean

· Tashar Halittu ta Palo Verde : busasshen daji na wurare masu zafi da kuma dausayin ruwa mai tsafta a arewa maso yamma

· Tashar Halittu ta Las Cruces : dazuzzukan tsaunuka (gami da dajin gajimare masu tsayi) da kuma wurin Lambun Tsirrai na Wilson

· Cibiyar Jagorancin Kimiyya ta Skukuza: Kruger National Park

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