We pick g.root-servers.net, one of the 13 root servers (1), and ask it about neotropicalornithology.org and learn that org is delegated to six name servers (2), so we ask d0.org.afilias-nst.org where we learn that neotropicalornithology.org is delegated to two name servers, including ns4.unam.mx (3), so we ask that one and get the following answer:
Neotropicalornithology.org is a domain controlled by five domain name servers at unam.mx having a total of six IP numbers. Some of them are on the same IP network.