Conservation researchers have increasingly begun to use drones to conduct population counts of animals or study changing habitats.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/drones-take-flight-wildlife-research-tools-while-conservationists-debate-their-proper-role
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/international-business-times
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wildlife
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/habitat
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/poaching
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rhinoceros
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/census-habitat-monitoring
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/science-and-technology