[3] He formerly led field courses on marine bird and mammal biology in Argentina, Mexico, Spain, China, New Zealand, Greece, Alaska, and elsewhere, but as Professor Emeritus does so only occasionally.

Most of Würsig's research, while focused generally on social, sexual, calf rearing, and foraging strategies, has been related to human use of the marine environment, as well as tucuxi and boto dolphins of the Amazon and the now believed to be extinct baiji of the Yangtze River.

[13] This work led to detailed descriptions of surface foraging and social behavior, as well as the fact that bowhead whales at times feed on bottom-dwelling organisms.

[14] Würsig and several colleagues developed and tested a bubble curtain system to reduce underwater industrial noises,[3][15] and this technique has more recently received much engineering[16] and environmental[17] attention.

Würsig has published about 200 peer review manuscripts, but the most important are probably those that first described results of individual recognition of dolphins by dorsal fin markings,[18][19] theodolite tracking,[20][21] and the development of a bubble curtain system to lower the intensity of stationary underwater industrial noises.

In 1999 Würsig coauthored a paper with international colleagues and former students David Weller and Amanda Bradford on the seasonal patterns of the western gray whales off Sakhalin Island in Russia.

[39] A new one on "Sex in Cetaceans: Morphology, Behavior, and the Evolution of Sexual Strategies" is edited by Würsig and Dara Orbach, also Springer Nature, due to be published Open Source in 2023.