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Protecting Special Places

delawarebay3 barnegatbay4 jamaicabay sandyhookbay sarasota-bay
By: Dr. Larry Niles, LJ Niles Associates LLC
Despite the threatening forecast of a cold drizzle and strong winds, our team persevered to complete the first bay-wide count of this season. On the New Jersey side of Delaware Bay, we counted 19,077 red knots – the most seen in the state in a decade. With Delaware’s shorebird team recording 2,000 knots along their entire shoreline, the total knot count of 21,077 is not far from the 24,000 seasonal maximum of the last three years.
 Red Knot Counts
This is good news in either of two completely different ways. One explanation is that perhaps most of the knots have already come to the bay. If so, they are in good time to make weight and are getting close to an on-time departure for the Arctic. The alternative is that even more will arrive and we will exceed our counts of the recent past. Good weights promise good Arctic production; more knots offer new hope.
 knots in formation
 
Knots in formation heading off to the Arctic (c) Jan van de Kam
The numbers of ruddy turnstones (12,295) and semipalmated sandpipers (56,788) are also close to the seasonal maxima counts of the recent past, so they too may soon brave the long flight to their Arctic homes. Our cannon-net catches of turnstones, sanderlings and knots point to weights building quickly.
 canon net catch
Canon net catch
The weather conditions play with our expectations. For the last few days, high westerly winds have generated beach-pounding waves all along the Cape shore. Its north/south orientation is perfectly perpendicular to the strong winds, and the wind-generated waves shut down horseshoe crab spawning. This forces the birds to seek shelter and better egg densities elsewhere.
 
Right from the start, the disappearance of the shorebirds we had been seeing intrigued us, for a good wildlife mystery gets consumed in this team like a good bottle of beer. Within hours, Mark Peck and Gwen Binsfeld found the knots south of where we would have expected. The knots, turnstones, sanderlings, and semipalmateds were comfortably riding out the wind storm on the vast, sandy intertidal flats in front of Sunray Beach and Villas. We haven’t seen birds gathering in numbers here since the early 2000’s.
 shorebird team
Photo of shorebird team by Kevin Karlson (from bottom right: Mark Fields, Stephanie Feigin, Mark Peck, Clive Minton, Angela Watts, Jeannine Parvin, Christophe Buidin, Alinde Fojtik, Dick Veitch, Barrie Watts, Joanna Burger, Arie Manchen, Steve Gates, Phillipe Sitters, Ana Paula Sousa, Reydson Reis, Chege Wa Karuiki, Susan Taylor, Mandy Dey, Peter Fullagar, Deb Carter, Gwen Binsfeld, Nick Smith, Clara Kienzi, Joe Smith, Larry Niles, Humphrey Sitters, Stefanie Jenkinson, Ally Anderson, David Stallneckt, Gerry Binsfeld, Christian Friis, Chris Davey)
But back to the count. We found shorebirds all along the Bayshore with three areas of concentration. The first was the aforementioned Villas flats. The second was in the Pierces Point to Reeds Beach area, with most in the more southerly portion of the sector. “Not-knots” (mostly semipalmated sandpipers) were seen there in big numbers during the boat survey by Yann Rochpault, Christophe Buidin and Tom Baxter. They saw 12,000 shorebirds along this mostly unpopulated shoreline.
Semi palmated sandpipers
Semi palmated sandpipers along shoreline (c)Jan van de Kam
But the real shorebird wonderland of the bay continues to be Egg Island. Few people see this vast intertidal marsh, and fewer still appreciate its wonder. Egg Island – actually a peninsula – juts miles out into the bay, nearly to the shipping channel. The marsh cradles one of the most diverse bird faunas of the mid-Atlantic. All along its mucky eastern flank, short-billed dowitchers, dunlin, semipalmated sandpipers, black-bellied plovers, and semipalmated plovers comb the eroded banks for crab eggs drifting in the water column from better crab breeding sites. The crabs themselves attempt to breed in the overhanging edges of the spartina marsh, a lost cause; however, because the muck lacks oxygen and the eggs cannot develop. This is bad for crabs but good for shorebirds because most of the eggs end up on the sod banks, easy prey for shorebirds.
wonders egg island
But this week, the wonders of Egg Island overwhelmed us. Our team – Humphrey Sitters, Phillipa Sitters and this blog’s author – wove along the shallow shoreline in our intrepid 17-ft Carolina skiff, counting thousands of shorebirds – 8,226 knots, 4,125 ruddy turnstones, 3,000 sanderlings, and 21,000 semipalmated sandpipers. The flocks swirled around the peninsula’s sandy western shore, alighting, then flying, and then alighting again. It was a shorebird dance that was a wonderful sight for increasingly tired-out shorebird scientists.
 

Learn more:

Dr. Larry Niles has led efforts to protect red knots and horseshoe crabs for over 30 years.

By: Dr. Larry Niles, LJ Niles Associates LLC

The value of a shorebird stopover like Delaware Bay can be seen in the shaky cam movie by this author.  Red knots – some recently arrived after a grueling 6,000-mile flight over 6 days of continuous flying – arrive on the Bayshore desperate for food. Over the last 10,000 years, the species has evolved to fly directly to the Bay to feed on the eggs of the horseshoe crab.

The 450-million year-old crab – which is actually in the spider family – crawls ashore and lays pin-sized eggs about 6 inches deep in the sand. When there are many crabs, as here on Delaware Bay, one crab often unearths the eggs of another. Thus they leave millions of fatty eggs on the surface, offering an energy-rich, soft feast for the starving birds. In turn, we get to watch the birds racing for an egg ‘hot spot’!

The birds often arrive beyond depleted. A normal weight for a knot is 130 grams.  Many arrive on Delaware Bay below 100 grams, the equivalent of a human in the throes of profound starvation. But when the birds fly north from the coast of northern Brazil, there’s no turning back. Once they go, they must go all the way.

flight path

Map of geolocator track of a South American wintering red knot

Read more: 2015 Delaware Bay shorebird project continues

 members day annual meeting beach
Please join the American Littoral Society for a day of celebration and to thank you, our members. Activities include guided walks along the bay, beach, and marsh, a BBQ and an election of Trustees.
Date: Saturday, June 13
 
Time: Noon to 4pm
 
Location: 18 Hartshorne Dr. Highlands, NJ 07732
Cost: Free for members, $20 per non-member guest 
 
Walks:
 
• Birding
• Seining
• Trees & Plants
 
Things to keep in mind...
  • Event is rain or shine so dress for the weather and comfort
  • Bring chairs or blankets for a picnic-style lunch
  • Field trips leave promptly at 12:15 p.m.
  • Upon arrival, check-in and sign up for your walk of choice
  • To avoid parking fee, notify rangers at the entrance booth that you are coming to the American Littoral Society
  • Public transportation from NYC to Sandy Hook is available by ferry, for schedule and fares click here.
 

Videos by NJTV & NJ.com

On Thursday, April 16, the American Littoral Society expanded its oyster reef restoration project by placing 120 cubic yards of whelk shell within the shallow waters of Barnegat Bay off Good Luck Point in Berkeley Township, NJ. An ongoing effort to restore important habitats in the Bay, the project will introduce new innovations intended to increase its success in returning oysters to the Bay.

Read more: Effort to Restore Bay Includes New Innovative Approaches

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