Modulation of the prolactin and the corticosterone stress responses: Do they tell the same story in a long-lived bird, the Cape petrel?

► Prolactin and corticosterone levels are affected by stress in Cape petrels. ► These two stress responses are not modulated according to the same factors. ► Prolactin levels, but not corticosterone levels, are related to reproductive performances. ► These two stress responses are not correlated under any circumstances. ► These two hormones mediate different parts of stress responses in wild birds.