Penis extrusions by humpback whales (Megaptera novaeangliae) on the Hawaiian winter grounds. (2002)
Journal Article
Pack, A. A., Herman, L. M., Craig, A. S., Spitz, S. S., & Deakos, M. H. (2002). Penis extrusions by humpback whales (Megaptera novaeangliae) on the Hawaiian winter grounds. Aquatic mammals, 28, 131-146

The annual winter assembly of humpback whales (Megaptera novaeangliae) in tropical waters has been linked to reproductive activities, including birthing, calf-rearing, and mating. However, the sexual behaviour of this species remains largely undescri... Read More about Penis extrusions by humpback whales (Megaptera novaeangliae) on the Hawaiian winter grounds..

Male mate choice and male-male competition coexist in the humpback whale (Megaptera novaeangliae). (2002)
Journal Article
Craig, A. S., Herman, L. M., & Pack, A. A. (2002). Male mate choice and male-male competition coexist in the humpback whale (Megaptera novaeangliae). Canadian Journal of Zoology, 80(4), 745-755. https://doi.org/10.1139/z02-050

Male humpback whales (Megaptera novaeangliae) outnumber females on the winter grounds and compete physically for proximity to females. Analyses of identification photographs collected in Hawai¢i from 1976 through
1995 and scan samples collected in 1... Read More about Male mate choice and male-male competition coexist in the humpback whale (Megaptera novaeangliae)..