New generation of Great Blue Herons born in cypress rookery

The cypress trees in the wetland near the proposed DePave Park at Alameda Point have served as a safe and secure nesting site for Great Blue Herons for many years.  This year is no exception, despite the trees having died and barely standing.  On May 7, Audubon Society bird observer Dawn Lemoine counted 13 juveniles in the nests.

The wetland around the cypress trees provides the ideal landing spot for the young herons’ first flight and subsequent adaptation to life outside the nest.  They can be seen for the first week or so after leaving the nest hanging out in the wetland preening and sunning themselves. Continue reading “New generation of Great Blue Herons born in cypress rookery”

Western Bluebird chicks raised on smorgasbord of bugs

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.

Continue reading “Western Bluebird chicks raised on smorgasbord of bugs”

Harbor seal pup grows up at Alameda Point

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.

Here is a gallery of photos from April showing the pup nursing, resting on the float, and riding on its mother’s back in the harbor.  The pup can be identified when on the float as the one with the light gray coat.  Continue reading “Harbor seal pup grows up at Alameda Point”

Harbor seals max out their float in December

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”

Bay pipefish indicates eelgrass in Alameda Point harbor

A Snowy Egret caught two Bay pipefish in quick succession along the shoreline next to the Hornet Soccer Field on Sunday, November 24.  This sighting of the Snowy Egret catching a pipefish is evidence that eelgrass, a special status marine vegetation, is present in the harbor east of the ferry maintenance facility.  Pipefish “do not wander far from the eelgrass bed where they were born,” according to Bay Nature magazine.  Eelgrass is pipefish habitat, in part, because pipefish are able to avoid predators as their slender bodies blend in with the narrow blades of eelgrass. Continue reading “Bay pipefish indicates eelgrass in Alameda Point harbor”

Red-breasted Nuthatch in fall feeding mode

This Red-breasted Nuthatch was part of a small flock busily feeding in an evergreen tree in the old campground next to the Bay Trail on October 15th.  Notice the bird’s legs in the first two photos.  It looks like it is standing on  long stick-like legs, which is an illusion.

Continue reading “Red-breasted Nuthatch in fall feeding mode”

Environmentalists sink Nautilus data center

The proposal by Nautilus Data Technologies to set up a water-cooled data storage facility at Alameda Point was soundly rejected by the Alameda City Council on June 18.  The facility would have pumped over 14 million gallons of water a day through its facility to cool computer servers.  The company said water cooling is better for the environment than existing air conditioning technology.  But by the time the environmental community was finished weighing in, it was clear that the Nautilus once-through cooling system would have replaced one problem by creating a new one.

The screen on the intake pipe underneath Pier 2 sounded good, until you consider that all the water coming out the other end in the Bay would have been filtered water that would have upset the natural ecological balance.  Marine life would have been pasted against the intake screen and periodically scraped off.  Tiny organisms would have made it through the screen and potentially been killed by the heat.  The heated water at the point of discharge was another big concern, since warming water is one of the conditions in which toxic algae blooms occur.

Below are excerpts from letters sent by environmental groups to the city council and excerpts of public comments at the meeting.  Thank you to all who spoke up for the natural world and our fragile Bay ecosystem. Continue reading “Environmentalists sink Nautilus data center”