Limited time opportunity! Catch a rare glimpse of nesting ospreys during a ride on the Seaplane ferry. The birds won’t be here much longer.
The adult ospreys have been bringing fish, the only food they eat, to their young for about a month. Their three fledglings are almost ready to start flying. Once the young birds start flying, they will hang around the nest for a week or two before they depart and have to quickly become adept at catching their own fish.
Ospreys nesting around San Francisco Bay is a relatively recent phenomenon, according to Tony Brake, a volunteer who has been monitoring ospreys around the Bay for over a decade. “There were no historical nesting records for ospreys until 1990,” said Brake.
Political favoritism may have affected the decision.
The San Francisco Bay Restoration Authority has denied the city’s request for a planning grant for DePave Park at Alameda Point (City to Seek Funding for Wetland Park at Alameda Point, Sept. 24, 2020). This ecological wetland park is proposed for the western side of the Seaplane Lagoon. The rejection letter and the agency’s ranking of applicants raise questions of fairness in awarding grants.
The Alameda City Council did not help matters when it rejected calls to include funds for a DePave Park master plan in the recently-adopted two-year budget.
In the recent round of grant awards from the Restoration Authority, Alameda’s request for $1.165 million for DePave Park planning was denied, while the East Bay Regional Park District (EBRPD) was awarded $500,000 for designing the Hayward Marsh Restoration Project. Whether or not a 2016 campaign contribution from EBRPD to the Restoration Authority’s ballot Measure AA gave them a bump in the rankings is unclear. But the optics are not good.
The brightly colored male and its grayer colored mate were spotted briefly landing on top of an old light pole, as if to show off their insect catch. More likely it was a precautionary stop to ensure that no predators were lurking nearby before springing into air and entering the nest cavity in the pole just below the top.
This was the only clue in early May 2020 that a pair of Western Bluebirds had a nest at the old campground at Alameda Point. The chicks were silent and unseen for weeks until they began peering out of the hole a few days before flying away.
A harbor seal pup is being raised by its mom at Alameda Point. It is the fourth year in a row that a pup has been observed utilizing the harbor seal float. It is unknown where any of the pups were born.
On December 23, the number of harbor seals on the float at Alameda Point reached 80, a new record for a single day. The number of seals on the float exceeded 70 on 10 days during December, a new record for the month.
Seals were packed so tightly that some were barely hanging onto the edge. The cramped conditions when the float reaches 70 seals in December and January can lead to bouts of slapping and shoving, as harbor seals prefer to have some space when resting. Continue reading “Harbor seals max out their float in December”
Bottlenose dolphins do not usually come to mind when thinking of wildlife at Alameda Point. In fact, only three have been observed there in recent years, and those sightings were from canoes and kayaks. But on July 24, two more dolphins were observed with two regulars meandering around next to Breakwater Island. The standalone rock wall, or breakwater, is visible from Pier 3 where the USS Hornet Museum is berthed.
Alameda Point’s harbor seal population fluctuates between single digits and 50 during most of the year on the specially-built harbor seal float. But when the Pacific herring arrive in the winter to lay their eggs, many more seals arrive to feast on the herring, causing a sudden spike. Last winter, a spike in seal numbers to a record 70 came on January 5, 2017, in the midst of the herring run. This winter, the herring arrived sooner, in December, and so did more harbor seals, causing a spike to a new record of 73 on Christmas Eve and Christmas Day.
In the brief time span since the new harbor seal float was set in place, local monitors have assumed that it was simply the colder water temperatures that enticed greater numbers of seals to use the float in the winter. But in fact, they discovered it’s not the full story.
It turns out that dropping water temperature indeed has an effect, but the effect is on the herring. Ideal water temperature for herring spawning is between 50 and 53.6 degrees Fahrenheit. The water temperature at Alameda Point dropped below 54 degrees the afternoon of December 16 and continued dropping another 2.3 degrees, according to data collected by the National Oceanic and Atmospheric Administration. This brought on the herring run and, in turn, the voracious seals.