Eagle Scout candidate Kyle Agudo and Boy Scout Troop 61 give ospreys a boost in the new year
Ben Wurst, Habitat Program Manager
Troop 61 lift an osprey nest platform into place on the coastal saltmarsh. photo by Kathy Agudo.
Humans have played a key role in the recovery and stability of nesting ospreys throughout New Jersey and beyond. Today around 75% of the population, close to 500 pairs, rely on nest platforms designed specifically for them. They provide a stable nest platform, adequate perches, and protection from potential ground predators, aka raccoons. Many platforms are located in very close proximity to people, which make for excellent viewing and educational opportunities. Ospreys are a symbol of a healthy coast and resiliency in a dynamic region.
A ground nest with three young. photo by Ben Wurst
It’s not very common to see ospreys, a large predatory bird, nest on the ground. Despite the rarity of these sightings, it has become more common and acts as a glimpse into the past (and future), before humans dominated the landscape. Today, more and more ospreys are building nests on the ground and snags over water.
Summer is here. As we reach the peak of the osprey nesting season in New Jersey, we conduct surveys to monitor their overall nest success and health of the state wide population. These surveys are conducted by specially trained volunteers who devote much time to ensure ospreys have a future in New Jersey. These surveys have been conducted every year since the early 1970s and are crucial to track any possible downturn in a colony, watershed or region of the state. Ospreys are a very important indicator of the health of the environment in which they live. This is especially important in coastal areas where they support a booming shore economy that is built around clean water and abundant marine/estuarine ecosystems.
Results from 2019 Osprey Nest Surveys highlight another productive year.
by Ben Wurst, Habitat Program Manager
An osprey nest in a snag on Barnegat Bay. July 2019.
Surveys of osprey nests in New Jersey have occurred annually for the past forty five years. They are conducted to help determine the overall size and health of the population. The first aerial survey over Barnegat Bay counted only five active nests. Ten years earlier there had been over 50. The combined effects of DDT and habitat loss had taken their toll. No osprey nests were productive and the population at risk of being extirpated from the state.
“In 1974 there were only five active osprey nests on Barnegat Bay. Today there are approximately one hundred and fifty.”
After ospreys were listed as endangered an innovative effort to transplant viable eggs from the Chesapeake Bay to Barnegat Bay began. In addition, to help replace natural nest sites that were lost to development, man-made nest platforms were designed and installed away from human disturbance. Slowly osprey pairs became productive thanks to the die hard effort of State biologists like Pete McLain, Kathy Clark and many volunteers and partners. It’s encouraging for us to look back to see how far we’ve come in the statewide recovery of ospreys in New Jersey.
by Marissa Murdock, 2019 NJ Osprey Project Intern; Rider University ’21
Marissa holds osprey 83/K who was banded after pre-maturely fledging and landing on the ground.
This past summer I was lucky enough to work with Conserve Wildlife Foundation as a volunteer student intern. I worked alongside Ben Wurst, CWF’s Habitat Program Manager, helping with the New Jersey Osprey Project. My internship consisted of assisting with osprey surveys, banding young, and recording data so that we can estimate the health of the population in New Jersey.
Support New Jersey’s ospreys with donations matching a $12,500 challenge to help Conserve Wildlife Foundation purchase a boat.
by Ben Wurst, Habitat Program Manager
Surveying a nest on Long Beach Island in 2017, the last year we were able to utilize a state owned boat. photo by Northside Jim.
Ospreys are living barometers. They symbolize the resilience of life along the New Jersey coast. As a top tier predator who feeds exclusively on fish, their collective health is a direct link to the health of our coastal waters. Anyone can tell you that a healthy coast is essential to life at the shore. Clean water with abundant and healthy wildlife equals a booming shore economy. We have all benefited from actions and policy that have protected our air, land and water since the 1970s. Ospreys are no exception.
Banding osprey nestlings with red auxiliary bands at a nest off LBI. photo by Northside Jim.
If you live along or visit the coast, then it’s no surprise that ospreys continue to thrive in New Jersey. 2018 was yet another banner year for these coastal nesting raptors. Their large stick nests depict our rivers and estuaries while they indicate that we’re doing a good job of protecting our local environment along the coast. Today we’ve published results from last year’s nesting season in the 2018 New Jersey Osprey Project Report.
On Sunday January 13th, 2019 photographer, Bob Cook was taking photos of the ~20 eagles at a lake in a Mercer County park. He noticed that one of the eagles had a green tag on it’s right leg. After reviewing the photos it was established that the band was D/99.
D/99;1/13/19@ Bob Cook
D/99 is from the Duke Farms nest located in Somerset County. He and his two siblings grew up as a celebrities their every move being watched by viewers of the Duke Farms eagle camera. The three chicks were banded on May 12th, 2014. Measurements showed that there there were two males and one female, D/99 was the youngest male. All three fledged from the nest in June 2014.
chicks at Duke Farms nest 5/12/14. D/99 is in the middle.
Unfortunately, in August of 2014 we received a report that D/98, the oldest male, was found dead up in Maine. He most likely died of injuries that occurred during a fight with another eagle. This most recent sighting of D/99 is the first report of either of the two remaining chicks. D/99 will be five years old in April and reaching the age where he will be looking for a mate and establishing his own territory. It is always nice to know that a chick has survived to adulthood and most likely has come back to NJ to nest.
The Conserve Wildlife Foundation of NJ in partnership with the NJ Division of Fish and Wildlife, Endangered and Nongame Species Program, has released the 2018 NJ Bald Eagle Project Report.
“Two hundred-four nest sites were monitored during the nesting season, of which 185 were documented to be active (with eggs) and 19 were territorial or housekeeping pairs. Thirty new eagle pairs were found this season, 20 in the south, nine in central and one in the north. One hundred-twenty-one nests (66%) of the 182 known-outcome nests produced 172 young, for a productivity rate of 0.94 young per active/known-outcome nest. The failure rate was well above average with 61 nests (33%) failing to produce. The Delaware Bay region remained the state’s eagle stronghold, with roughly half of nests located in Cumberland and Salem counties and the bayside of Cape May County.”
The number of active nests has increased while the number of young eagles fledged has decreased since a high of 216 young fledged in 2016. During the 2018 eagle nesting season there was an abundance of cold, wet, windy and snowy weather which was the cause for a portion of the nest failures. As the eagle population increases, there are more eagles competing for territories. This can also be a contributing factor in nest failures. NJ is still in the range of 0.9 to 1.1 young per nest which is needed for population maintenance with a productivity rate of 0.94 young per known-outcome/active nest in 2018. The 2018 NJ Eagle Project Report has all the details on the project including telemetry, re-sightings and recoveries.
The success of the eagle project is due to the tremendous dedication of the NJ Eagle Project Volunteers. They monitor the nests in all types of conditions and education people about the eagles with enthusiasm.
