On Saturday, January 19, Conserve Wildlife Foundation of NJ (CWF) will host an osprey platform construction day from 10:00 am to 3:00 pm at Tuckahoe Wildlife Management Area in Woodbine, New Jersey. Volunteers who signed up in advance are helping to build up to 20 new platforms to replace those lost or damaged in Superstorm Sandy.
Constructing these platforms now will allow CWF time to install them before the start of the osprey nesting season in April. Ospreys mate for life and typically return to the same nest year after year.
Since Sandy slammed into the coast of New Jersey in late October, biologists with CWF have been actively surveying and assessing damage to habitat that wildlife needs to survive. Many osprey nesting platforms were right in the middle of the high winds and strong storm surge associated with Sandy. The majority of the platforms weathered the storm; others need repairs or must be replaced. We have already installed 5 new nesting platforms. Two platforms were installed on December 1st on Herring Island (N. Barnegat Bay) in an area of homes that sustained significant damage. The other three platforms were installed in the Wildwood area.
Since Sandy slammed into the coast of New Jersey we have been actively surveying damage to habitat that wildlife need to survive. Ospreys are currently on their wintering grounds in N. South America but their many nesting platforms were right in the middle of the high winds and strong storm surge from Sandy. For the most part, the majority of the platforms weathered the storm. Some of the old, small, and weak platforms were carried away with the surge (like this old duck blind on Herring Island on N. Barnegat Bay).
Ospreys mate for life and have a high level of site fidelity, so the nesting pair (if they survive the wintering season) will return to the same nest, and do so year after year. For the platforms that were occupied and washed away, we aren’t sitting around waiting for issues to arise when ospreys return to their nest sites next March. Since Sandy hit on October 29th we have already installed 5 new nesting platforms. Two platforms were installed on December 1st on Herring Island, which is right in the middle of the area where Sandy had devastating effects on the shoreline. The platforms were built before the storm by Point Pleasant resident Tom Vannostrand. The new platforms were installed to replace an old duck blind that was damaged late last year (possibly from Irene) and washed away by Sandy. When the pair of ospreys returned to nest on the blind this year they found that their nesting structure was damaged and attempted to build a nest on a nearby home. Long story short, the homeowners weren’t so happy and had the nest removed by USDA.
You can help us build and replace other platforms damaged by Sandy. On January 19th, from 10-3pm we are hosting a volunteer build day to construct 20 nesting platforms.
Post-storm surveys and reports from public equal a sigh of relief!
by Ben Wurst, Habitat Program Manager
No doubt the effects of superstorm Sandy will be felt for a long time, especially to residents of coastal areas who experienced flooding with the associated storm surge. During the past two hurricanes, Irene last August and now Sandy, I was really worried that a lot of osprey nesting platforms would get damaged or lost during the storms. Luckily my worries didn’t become reality! So far most nesting platforms are still standing strong despite a 15′ storm surge with sustained winds of at least 70-80mph. I’ve heard of a few structures that have fallen down. Most were probably ones that were older structures that were constructed poorly or installed too close to the edge on the saltmarsh. Over the next couple weeks we’re planning on getting out to other colonies to survey for damage caused by Sandy.
Last week we successfully installed an osprey nesting platform on the Manasquan Reservoir. The reservoir supplies water to residents of Monmouth County and can supply up to 30 million gallons of water a day. It’s also home to a variety of wildlife, such as bald eagles, osprey, waterfowl, freshwater mussels, and many other species. Since it’s creation in the early 1990s the many snags offered potential nest sites for ospreys; however, today many of the snags are falling down. The last nest site for ospreys broke in the winter of 2010-11. It was near the environmental center at the reservoir and offered visitors a close view of their nest and reproductive cycle. Since the nest tree broke no pairs have nested on the reservoir. Continue reading “Photo from the Field”
Marine debris (specifically plastics) have become a serious problem in coastal areas throughout the world, especially in the Pacific Ocean where gyres create large floating “garbage patches.” I work out on the back bays and salt marshes throughout the coastal region of New Jersey as I help to monitor and manage ospreys and their nesting platforms. Every time I’m out I encounter trash. Most of it accumulates along the wrack line on the higher portions of the marsh where storm surges, high winds, and during spring tides (during full and new moon phases) push it onto the marsh. This debris then makes its way into the nests of ospreys because this is where they collect most of their nesting material.
Severe weather may have reduced productivity this year
by Ben Wurst, Habitat Program Manager
Surveys of nesting osprey have ended for 2012. Each year volunteers, state biologist and CWF staff complete nesting surveys of ospreys. These “osprey banders” complete “ground surveys” (referred to as ground surveys because they are surveying nests by land/sea, not by helicopter) that cover around 70% of the state population. The surveys are meant to keep tabs on the state population and data collected from the surveys are used to determine the health of the population. Young are also banded for future tracking. Next year a state wide aerial survey will be conducted; the last aerial survey was in 2009 where 486 nesting pairs were found. We won’t know the total size of the population until then. Nesting success is mixed this year and is highly variable by different regions, mainly because of severe weather.
I never heard of a “derecho” until this summer. According to Wikipedia it is “a widespread, long-lived, straight-line windstorm that is associated with a fast-moving band of severe thunderstorms.” A derecho hit Cumberland, Salem, Atlantic & southern Ocean County in the early morning hours on June 30th, right in the middle of the nesting season for ospreys. Weather plays a significant factor in the success of nesting ospreys. They nest in open areas, which makes them vulnerable to high winds and severe weather, and since they primarily feed on fish, water clarity affects foraging success.
“In South Jersey, Atlantic City Electric reported that 206,000 customers lost power from downed trees. Most of the outages were in Atlantic County, which prompted a county-wide state of emergency. Near Atlantic City, a boater died while trying to bring his vessel ashore. Officials believed that lightning struck a 104-year-old church in Longport and caused a fire that damaged the building.An elderly couple was killed when a tree fell on their house. In Vineland, damage was preliminarily estimated at $125 million.On July 19th, 2012, President Barack Obama declared three counties in New Jersey (Atlantic, Cumberland, and Salem) federal disaster areas. This assured disaster relief through federal assistance to local and state governments and some non-profit organizations.” (from Wikipedia.com) I also know that two people were killed while sleeping in a tent at Parvin State Park.
At this time most young were between 2-3 weeks old, with some a little older and some younger. All young are very vulnerable to severe weather, especially when wind gusts reach 70-100 mph, they can be easily blown from their nests and if not retrieved quickly could become food for ground predators or washed away with the tide. Winds gusted to 81 mph in Tuckerton, 74 mph in Absecon (Reported by the NJ State Climatologist Dr. David A. Robinson). In three areas that I survey (Absecon, Mullica River, & Little Egg Harbor) many young were either lost or blown from their nests and found dead or live on the marsh. In Absecon 9 of the 22 young produced had been lost or found dead on the marsh as a result of the storm. At a couple other nests to the north a few young were found on the ground shortly after the storm. Off of Great Bay Blvd. many nests that had young before the storm had lost them. One of our volunteers reported that many nests in Ventnor that were previously occupied had no young after the storm.
We can only hope that severe weather like this will not occur during the middle of the osprey nesting season again, but with a warmer climate these might become commonplace in New Jersey. One thing that we might consider is to take a long look at our current design for nesting platforms and look to see if we can make changes to allow for a deeper nest bowl. More of a problem is that some ospreys do not build substantial nests and use little sticks and branches, while others build large nests that are not easily blown away with the wind.
By now most ospreys are back from their wintering grounds in Central and northern South America. Generally the older more experienced birds return first and the younger inexperienced adults follow. Over the past month I’ve been very busy with platform repairs and installations throughout coastal New Jersey. You may not be aware but I maintain a huge number of nesting platforms. In just the past couple weeks I’ve worked as far south as Avalon (where I lead a group of students and their parents from Collingswood to replace an existing platform) and as far north as Bayonne (where I installed 3 platforms with local middle and high school students). Both were memorable experiences for both myself and many of the students. Most of them had never been on a boat or ever had the chance to walk on the saltmarsh.
Maintenance of existing platforms is critical to the continued recovery of ospreys. Over time (and in some cases, not much time) the condition of these nesting platforms is degraded, mainly by the environmental conditions where they’re placed. For the most part the fasteners are what go first from contact with high levels of moisture in the air, after that, the wood decays (unless a pressure treated or cedar wood is used). One way to help prevent the decay of platforms is to use marine grade stainless steel screws, galvanized bolts, and treated lumber. If we were to lose a large portion of the available nesting platforms in a given year then the population would suffer, so it’s important to make sure existing platforms remain in good condition.
Last week I got out to the “Wildlife Drive” at Forsythe NWR in Oceanville to repair a platform. The platform top had lost a side and could no longer hold nesting material. I built a new top out of salvaged wood that I collect and installed it on Thursday afternoon. The next day a male osprey began to place nesting material in the freshly repaired platform. Talk about perfect timing!
If you’re interested in helping us to maintain osprey nesting platforms, contact me about our new program to “Adopt a Platform.”
Now is the time to repair, maintain, replace existing platforms and install new nesting platforms for ospreys. Over the next four weeks we’ll be busy doing just this. We have plans to do work in many areas throughout the coastal zone of New Jersey from as far north as Bayonne then down on the Barnegat Bay, Mullica River and south to Avalon.
The cutoff date for nest repairs is April 1st, when the nesting season begins. Over the next few weeks more and more ospreys will be appearing with larger concentrations towards the end of the month. If you see a new nest this year, please let us know so we can include it in our annual surveys.
Program from 1970’s restores osprey population to historic numbers
by Ben Wurst, Habitat Program Manager
A helicopter hovers over an active osprey nest to count the number of eggs. Image courtesy NJFW.
The New Jersey Osprey Project began after the osprey was listed as an endangered species in 1973. In April 1974 an aerial survey was conducted to count the number of active osprey nests. The survey was conducted from Toms River to Atlantic City. The results were grim. Only five active nests were found. 10 years earlier there were over 50 in that same area. On all of Barnegat Bay in 1974 there was only one active osprey nest.
The heavy use of DDT in the 1950’s and 60’s was the main culprit in the decline of ospreys by affecting their ability to reproduce. When used in marine environments it was quickly absorbed by organisms and soils. It accumulated in the food web and because it was fat soluble it bioacummulated in predators, especially birds of prey. In short, it caused the thinning of eggshells which often broke under the weight of the incubating female. This threat, along with habitat loss and persecution caused the population to become almost extirpated from the state.
It’s hard to believe that in another 6-7 weeks ospreys will be back in New Jersey and ready to begin another nesting season. Over the next few weeks we’ll be busy making repairs to existing nests, moving platforms to more suitable locations, and installing new nests to replace old derelict platforms. We maintain a huge portion of the available nest platforms along the coast and do so with no state funding! All of our funding comes from private donations from individuals, foundations, or grants. Since our osprey project began in 2006, we have installed more than 100 nesting platforms throughout New Jersey. What’s new? This winter we have plans to install three new structures in Bayonne with local high school students. This will be the furthest north that we have ever worked with ospreys. It’s a new and exciting endeavor for CWF. If you enjoy viewing ospreys during your visits to coastal areas of New Jersey during the summer, please consider making a donation today by sponsoring the placement of a platform or by adopting an existing platform.
