Data are from Frere and Gandini (2001), Frere et al. (2004) and Frere et al. (2005).
Nests are consisted of fronds of seaweed, feathers and guano. For some Argentinian colonies, egg laying occurs from mid-October to the third week of November, showing considerable asynchrony. Hatching occurred from mid-November to the first week of December. Clutch size range from 2 to 4 (mean = 3.04). Chicks fledge between late January and early February. After breeding, adults and juveniles remain in the breeding grounds.