An older nest site, on top of a vulcanic bluff. Past activity unknown.
What to look for
Look for 2 adults on the nest. The adult pair will show pair bonding behaviors such as vocalizations, aerial sky dances, and the male feeding the female fish. You may see the pair copulating, which typically begins 14 days before laying eggs.
Females will lay 1 - 4 eggs at a rate of one egg every 1 - 2 days. After laying, incubation starts. Look for adults taking turns sitting low in the nest incubating eggs. The incubation period can last 35 - 43 days.
Chicks hatch ~39 days after incubation begins. Look for adults bringing food to the nest and making "head bows" into the center. Chicks typically can't be seen until they are 2 - 3 weeks old, so feeding behavior is the only way to know chicks are there.
Around 4 weeks after hatching, look for the heads of chicks to show over the rim of the nest, particularly when adults bring food to the nest. Other times they lie flat and are harder to see. Count the number of chicks in the nest before they learn to fly
Chicks begin flying around 7 - 8 weeks old, and are still fed by the adults. Count the number of chicks who have successfully fledged the nest and are observed flying.
Chick Last Observed
4 - 10 weeks after fledging, chicks begin leaving the nest area to migrate south, once they have learned to fly and feed themselves. Record the date that the last chick left the nest.
Look for signs of nest failure like adult abandonment, adults no longer incubating eggs or feeding young.
06/27/14 One adult perched on edge of nest.
07/15/14 Very hot, 98 F. One adult in nest in shading posture.
07/23/14 One adult in nest with two chicks, nearly fully grown.
07/29/14 One young wing flexng, one watching, both fully grown.
03/24/14 One adult perched by nest.
04/08/14 One adult perched below nest.
04/28/14 No observed activity.
05/12/14 One visible low in nest, possible incubating.
05/18/14 One low in nest.
05/24/14 One low i nest.
05/31/14 One low in nest, another bringig fish to nest.
05/02/13 First for season on 04/03/13 and no activity.
04/11/13 One adult at nest, and 15 minutes later another flew into the nest
044/18/13 One on the nest site.
04/25/13 Two birds in the nest.
05/02/13 One low in the nest, possibly incubating, one flying in area.
6/28 One adult feeding unseen chicks. 6/29 one adult at nest for awhile, then left when the other arrived and started feeding chicks. After a short while I could see two chicks begging for food, abouit two weeks old, with white down..