Conserve Wildlife Blog

Posts Tagged ‘raptors’

Studying the Ridgway’s Osprey of Belize: Part III

Monday, April 3rd, 2017
Braving the Caribbean Sea to Survey Turneffe Atoll

by Ben Wurst, Habitat Program Manager

Jay T. loads gear into Horace’s boat on Sittee River.

For the final leg of our survey of Ridgway’s ospreys in the northern most part of our study area, we set out for Turneffe Atoll. Turneffe Atoll is an archipelago of mangrove islands and coral reef that’s approximately 20 miles east of Belize City. It’s 30 miles long and 10 miles wide and Belize’s largest coral atoll. Luckily, it was declared a marine reserve in 2012, which protects it from future development. Turneffe is an amazing assemblage of different marine habitats which provide habitat for a variety of many different species of wildlife, including American crocodiles (more on this later!), conch, spiny lobster, manatees, dolphins, sea turtles, and many species of birds, coral and fish. The mangrove islands are large with taller trees on the interior of the island. This is where most, if not all, the ospreys nest. We left on Monday, February 20th. (more…)

Studying the Ridgway’s Osprey of Belize: Part II

Tuesday, March 14th, 2017
Flat calm Caribbean and three young Ridgway’s!

by Ben Wurst, Habitat Program Manager

 

The flat calm beauty of the Caribbean sea.

February 18: Second Survey of nests surrounding Placencia

Our second survey began from Placencia, a small beach resort town on the southern coast of Belize, which is a beautiful place to visit if you’re planning a trip to Belize. It was flat calm that morning, which made for great boating, but it was extremely hot! Life in the tropics was finally setting in… We headed towards the first nest location, which was last surveyed in 2016 by Paul and his team. Paul and Alan have been surveying osprey nests in Belize since 2014, so all known nests have been mapped and surveyed over the past couple years. Through the continued surveys of these nests we should be able to determine if the low productivity of Ridgway’s (around .3-.4 young/active nest) can sustain the population in Belize (the southern most nesting colony of Ridgway’s throughout their range). The work performed as a part of these surveys is critical to their long term survival in Belize. The first nest we visited was very unkept; however a pair was present. This ended up being quite the common sight during this survey. (more…)

Studying Ridgway’s Osprey of Belize: Part I

Friday, March 10th, 2017
CWF contributes to conservation of Belizean ospreys

by Ben Wurst, Habitat Program Manager

A male Ridgway’s osprey perched near its nest on a snag off Blue Ground Caye. Photo by Ben Wurst

When I first learned of the work being done by Dr. Paul Spitzer and Alan Poole to study the breeding population of Ridgway’s ospreys (Pandion haliaetus ridgwayi) in Belize, I was instantly captivated. I first met Paul at the Raptor Research Foundation Conference in Cape May last October where he explained the study and the need for partners to assist with this years survey. Some of the aspects that immediately drew my attention was the fact that the estimated size of the population there was around 50 pairs, that those pairs nest exclusively on the coastal cayes (mangrove islands), and that their estimated productivity rate was around .3-.4 young/active nest. The coast of Belize is approximately 170 miles long and protected by barrier reefs and these mangrove islands. (more…)

Wildlife returns to the industrial Newark Bay waterfront

Tuesday, November 1st, 2016

by David Wheeler

Under the sweltering September sun, our team discovers the earth at our fingertips. We ready the manure, topsoil, and mulch, wield the pickax and trowel, and labor the wheelbarrow through the trees and up the slope of a tidal berm.

osprey-silouette-by-blaine

 

We plant 250 native shrubs and 580 native herbaceous plugs. We hammer in nest boxes, install pollinator houses, construct mounds of brush for local and migrating wildlife, and create nesting habitat for northern diamondback terrapin, an at-risk turtle species.

We lose ourselves in nature for the day.

A migrating butterfly flits past leisurely and I look up from the soil to wipe my brow. Suddenly I remember exactly where this newly vibrant natural ecosystem is. Nearly overhead, I can watch never-ending streams of commuters and tractor trailers motor past over one of the busiest bridges in the nation – the Newark Bay Bridge. Just across the bay, I can see heavy industry. Out beyond the fence, more industry – ancient, tireless, modern progress marching forward.

firmenich-volunteers-by-blainefirmenich-by-blaine

Yet on this morning, and those that follow, we now have ecological progress here as well, in a place that was written off entirely not so long ago. The Newark Bay region has suffered a century and a half of environmental degradation at the hands of industry and unbridled development.

This active industrial site is home to Firmenich Inc., one of the largest manufactures of fragrances in the world. We have transformed the land today to invite wildlife partners to help balance the scales of the region’s damaged ecology.

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Green Darner dew laden on Echinacea.

These partners are vital to our environment, to our health, to the world around us. They are the butterflies and bees, the wasps and beetles, the flies and moths that make up an army of pollinators that in coordinated effort provide humanity with the lungs of our planet. Without these pollinators, native plants could not sink carbon dioxide and impart oxygen to our surroundings, every minute of every day. Without these pollinators, the bread baskets of the world would wither away, no longer filled with grains, fruits, and vegetables.

The natural partnerships don’t stop with the pollinators born forth from meadow creation. These partners extend to migrating songbirds and mighty raptors, small mammals and diamondback terrapins.

“If we give nature an inch, it’s going to take a yard. Give it a chance and nature will return,” says biologist Blaine Rothauser, who is directing the restoration for GZA Environmental. “Wildlife just needs an opportunity.”

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Immature night heron with crab.

Nature’s inspiring return builds upon decades of ecological recovery in the region. Thanks to President Nixon’s Clean Water Act of 1973, the water began to get cleaner. Improving the water quality reanimated the food chain from the bottom up – phyto- and zooplankton, invertebrates and crustaceans reappeared. In turn, a fishery was reborn, which ushered in the return of herons, ibis, osprey, turtles, and even harbor seals – seen sunning on the banks of tidal shores in winter!

Yet much of the land around the water’s edge is still wanting.

“The restoration site is an important buffer habitat to a large portion of undeveloped tidal bay directly adjacent to the Firmenich complex,” says Rothauser. “Today we have 60 people planting a native community of shrubs, trees and plants on a formerly sterile lawn and an unnaturalized earthen berm. It is vital work that makes a real difference.”

blaine-with-plants

The team has also created opportunities for rare species to nest. Above our heads, an osprey platform has been installed, empowering this magnificent fish-eating raptor to continue its recovery along Newark Bay and many other New Jersey waterways, industrial and remote alike.

A barn owl box offers one of our most mysterious nighttime predators the opportunity to set up shop in a beneficial area – where there is no shortage of rabbits and field mice to help control.

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Close up of a barn owl.

Across the pond, a purple martin condominium-like house offers the ample space necessary for these communal swallows to reside, a home base where they can feast on flying insects.

With the first phase of the project almost complete, the second phase will seek to transform the site’s holding ponds into ecologically productive floating wetlands, bringing herons and egrets and other wading birds.

Ultimately, this project is envisioned as one that can be replicated just about anywhere along Newark Bay – or any industrial waterfront for that matter. All it takes is the willingness to look at a site’s land from a different perspective – and in so doing, to understand that the ecological benefits of bringing back many wildlife species aren’t negated by losing economic tradeoffs.

Instead they can mean parallel economic benefits. Natural pest control. Fewer landscaping and pesticide costs. Increased employee morale and productivity, with a newfound opportunity to recharge body and mind with a rejuvenating break outside, enjoying natural beauty and the engagement of your senses.

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Images above from left to right – Killdeer, 12 Spotted Skipper, and American Kestrel.

New Jersey has long served as a primary engine for America’s industry and commerce – and in return has often been derided as the “Which exit?” land of nothing but turnpike and smokestacks. The Meadowlands just to the north of here bore the brunt of that reputation, yet in recent decades has made a mind-blowing ecological recovery to become a wildlife – and ecotourism – destination.

The waters flow south from the Meadowlands along the Hackensack and Passaic Rivers, and they come together in the Newark Bay. Now, that next wave of wildlife recovery and habitat restoration has arrived just downstream – along the Newark Bay waterfront.

For wildlife, it’s where the action is.

firmenich-group-pic-by-blaine

David Wheeler is the executive director of Conserve Wildlife Foundation and author of the book, Wild New Jersey: Nature Adventures in the Garden State.

 

All photos courtesy of Blaine Rothauser.

 

International Migratory Bird Day Series: American Kestrel

Friday, May 13th, 2016
CWF is celebrating International Migratory Bird Day all Week Long

by Lindsay McNamara, Communications Manager

CWF’s blog on the American kestrel is the fifth in a series of five to be posted this week in celebration of International Migratory Bird Day (IMBD). IMBD 2016 is Saturday, May 14. This #birdyear, we are honoring 100 years of the Migratory Bird Treaty. This landmark treat has protected nearly all migratory bird species in the U.S. and Canada for the last century.

American Kestrel photo by Robert Lin.

American Kestrel photo by Robert Lin.

In New Jersey, catching a glimpse of an American kestrel is a rare treat! These beautiful, colorful birds of prey are about the size of a mourning dove — they are the smallest falcon in North America. Kestrels are one of two falcon species that nest in New Jersey.

 

American kestrels are opportunistic hunters, feeding on a number of different animals like grasshoppers, lizards, mice, snakes and small birds. Unlike peregrine falcons, kestrels don’t use speed to kill their prey. They perch to see their target and then use a stationary, hovering flight that allows them to dive down short distances to capture their prey. The eyespots of a kestrel make it appear to be “looking” up at its aerial predators, like Cooper’s hawks, causing the predators to move on to find a less “alert-looking” target. The eyespots give kestrels the opportunity to focus on hunting for prey beneath them.

 

Kestrels also hide surplus prey in grass clumps, tree roots, bushes, fence posts, tree limbs, and cavities, to save the food for lean times or to hide it from potential thieves!

 

Kestrels utilize these hunting tactics in open, grassy habitats — especially ones with cavities for nesting and perches for hunting. Kestrels can be seen hovering in grasslands, pastures and parklands or perched along the road on telephone lines.

 

KestrelRangeKestrels can be found in both North and South America, from Alaska and Canada in the north to Argentina in the south. During winter in North America, they will migrate southward from the northernmost portion of their range. They live year-round within New Jersey.

 

Although the American kestrel is widespread, meaning they live year round throughout much of the United States, the northeastern kestrel population is declining. Today, the kestrel is listed as a threatened species in New Jersey.

 

The decline of kestrels in New Jersey is likely due to destruction of grasslands from development. Nesting cavities are also being lost. As humans clean up fields, we remove trees with nest cavities that kestrels use. Kestrels are secondary cavity nesters. They don’t make their own cavity but use existing natural or man-made cavities.

 

Since kestrels nest in buildings and other man-made structures, nest box programs are an effective way to help grow the number of kestrels in areas where nest sites are limited.

 

Conserve Wildlife Foundation of New Jersey, in partnership with the Endangered and Nongame Species Program implemented a nest box installation and monitoring program in 2006. Nest boxes have been placed in areas of habitat determined to be suitable for the birds of prey. The boxes are monitored by biologists during the breeding season. Because kestrels reuse nest sites, particularly if they have successfully raised young, we focus on boxes that have been successful at least once since 2006.

 

The nest box program in New Jersey appears to be successful; we are adding to the population. Since 2006, we have banded over 300 fledglings. You can help too! Next time you see an American kestrel in the Garden State, be sure to submit a Rare Species Sighting form.

 

Learn More:

 

Lindsay McNamara is the Communications Manager for Conserve Wildlife Foundation of New Jersey.