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.
One individual (sex unknown) present in the nest. There is no white spotting, so this individual is presumed to be an adult. There is a large female in close proximity to the nest perched in a dead tree, just next to the marsh area. Brief calling noted upon secondary approach of the nest.
Vocalizations can be heard upon approach and for the duration of the observation. Primarily two individuals can be seen perched facing the bay. It is unclear if either of these individuals are juveniles. Secondary observation leads to the same conclusions.
Both male and female present. Female appears to be brooding, while male sits on the "V" poles on the nesting platform. Male calls periodically, appearing to be responding to soaring individuals in the vicinity. Eventually the male flies off and out of sight. Upon secondary observation, only the female is present, brooding in the nest.
First observation reveals that no individuals seen. Adult male and female are present without chicks in the nest. Two chicks are spotted in the tree line on the opposite side of the main trail. They are silent and observant but appear calm around all of the trail activity.
Male and female are present with one visible chick. Male is on the perch pole while female sits in the nest with the chick. Upon further observation it is noted that there are in fact two chicks in the nest.
Male and female appear to be feeding chick(s). Upon further observation, two chicks are confirmed. The third observation leads to the sight of male taking off after an unidentified osprey individual. Female and chicks remain in the nest
Unidentified individual and one chick clearly visible. There is frequent calling by the adult. Upon second observation the situation has not changed. The third observation notes no calling, otherwise the situation remains similar to the first observation.
Unidentified individual sits on the edge of the nest. Upon the next observation, a female is identified to be sitting on the nest, and one chick's head is visible from the baseline of the nest. The third and final observation leads to the sight of both male and female present. The female sits in the nest with the chick(s) and the male sits on the nearby perch pole.
Primary cursory observation female perches on the edge of the nest. No male in sight. Secondary observation male soars nearby, female does not appear to tend to chicks. Upon third observation one chick beak is seen with female perched on the edge of the nest. Male flies in and perches on the 'V' perch.
Male and female present and vocalizing. Male perched on "v" switches from side to side for the duration of the observation. Female seen shredding what appears to be fish, possibly feeding chicks or eating herself. Upon second observation, male and female in the nest with no vocalizations. Third observation male is back on the "v" perch.