N'afọ 1992, Rasmussen weghaara ọnọdụ nke onye na-enyere S. Dillon Ripley aka, onye bụbu odeakwụkwọ nke Smithsonian, bụ onye na-eme atụmatụ ịmepụta nduzi doro anya maka nnụnụ nke South Asia. Mgbe ọ malitere ọrịa obere oge mgbe ọ malitere ọrụ ahụ, Rasmussen weghaara ọrụ ahụ, ya na onye na-ese ihe nkiri John C. Anderton, mepụtara Nnụnụ nke South Asia: The Ripley Guide, akwụkwọ nduzi nnụnụ abụọ maka mpaghara India nke bụ akwụkwọ ntuziaka mbụ maka mpaghara ahụ iji tinye sonograms. Mpịakọta nke 1 nwere ntuziaka ubi na ihe karịrị 3400 ihe osise na efere 180, na ihe karịrị 1450 map agba. Mpịakọta nke 2 (Njirimara na Ọnọdụ) na-enye ihe atụ, banyere njirimara, nkesa, ọnọdụ, na omume. A na-akọwapụta ihe ndekọ site na Vocalizations, na e nwere ihe karịrị 1000 sonagrams.1508 ụdị ndị dị na South Asia.
Assam, Arunachal Pradesh, Bangladesh na Afghanistan