January
This is the month with the most births. Mothers give birth a few days after arrival. While labor may be long, the actual birth usually takes only a few minutes. Mom immediately turns to bond with the new-born, sniffing, listening, and “talking” in a high-pitched voice. This will help mom and pup keep together. Once the pup finds one of the two nipples it will nurse on milk that increases from 12% to 60% fat. In the usual one month of nursing, the pup will grow from 70 pounds to 300 pounds (30 kg to 135 kg).
During her 5-week stay, mom loses about 40% of her body weight. In the last week of nursing she comes into estrus. She will mate with the harem master, perhaps several times, and return to the sea. The weaned, one month-old pup remains on shore and is now on its own. The weaned pup, or weanling, will live on its blubber for two or three months until it leaves the rookery for its first trip out to sea.
February
Birthing peaks in January and continues into February. Mating peaks in mid-February. There may be fights as males try to improve their standing. As their mothers leave the beach to finally break their fast, the weaned pups gather in “pods” near the bluffs, avoiding...
March
Adult males that arrived in December leave the beach. They have lost as much as 40% of their weight, after fasting for over three months. The older weanlings will begin to make their way to the near-shore waters. For those raised on the higher, distant parts of the...
April – May
Adult females that left the rookery after weaning their pups, as well as juveniles that were out at sea all winter, begin arriving late in March. This is the start of the molting season. Growing new skin at sea would cause a tremendous heat loss. Instead, they come...
June – September
In June we begin to see the arrival of males with the first sign of puberty – the growth of the nose (proboscis) which begins at about age five. As the molting season continues, we then see more older males, finishing with the arrival of the adult males in July and...
September – November
Before all the big males have left, the fall haul-out begins. Juveniles of both sexes return from their post-molt migration. They have been at sea since their molt in the spring. As youngsters, they come ashore in the fall, but as they grow into adults, they will make...
December
Adult male elephant seals weighing 3500 to 5000 pounds (1600 to 2300 kg) begin arriving late in November and will continue to arrive through much of December for the birthing and breeding season. Elephant seals birth and mate in harems. Only the strongest and most...
Get the Latest News & Updates
Donate
Friends of the Elephant Seal is a 501(c) (3) non- profit corporation, relying on grants, sponsorships, memberships and your donations. Your charitable contribution supports our programs.
Sign Up for E-mail Updates
Be among the first to receive updates, photos, events and more about the Piedras Blancas northern elephant seal colony. The Friends of the Elephant Seal does not share your personal information with outside advertisers or other organizations.
Follow Us
Follow Friends of the Elephant Seal on our social channels for up-to-the-minute updates and images from the rookery.
Friends of the Elephant Seal is a cooperating association with California State Parks.