Penguins exhibit what is called “bi-parental care,” which is where both parents cooperate to care for their babies. They will take turns watching over their nest, and one parent will leave to retrieve food or other resources. Once the chicks are a few weeks old, they will gather in groups called crèches.
Art by @tsoooki
[Edited by Isabelle McDonald]
Reference:
Vleck, C. M., Ross, L. L., Vleck, D., & Bucher, T. L. (2000). Prolactin and Parental Behavior in Adélie Penguins: Effects of Absence from Nest, Incubation Length, and Nest Failure. Hormones and Behavior, 38(3), 149–158. https://doi.org/10.1006/hbeh.2000.1589