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shorebird conservation

Conserving Wildlife, Delaware Bay, shorebird conservation, Uncategorized

20 Years on Delaware Bay – Shorebirds lift off to an uncertain end

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  I am reviewing a new paper by Sjoerd Duijns, a student working on the benefits of being a fat shorebird.   Still, a draft, the paper analyses data from radio-tagged red knots leaving the bay in good condition (ie fat)and finds they may leave later from Delaware Bay than lighter birds but arrive earlier in the breeding grounds because they can pick the best time to leave. They are also more likely to breed successfully and survive the Arctic breeding season to the following fall.  In other words being a fat knot on Delaware Bay makes life good. So in light…

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Conserving Wildlife, Delaware Bay, shorebird conservation

Abstracts from the meeting on 20 years of conservation and research on Delaware Bay

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Program   May 10, 2017: 09:00 – 17:00   Note: the program only identifies the name of each speaker. Co-authors are indentified in the abstracts that follow.   09:00   Welcome and introduction: Larry Niles   Research and conservation of shorebirds in Delaware Bay – Chair Larry Niles 09:10   Clive Minton: Twenty years of scientific and conservation work on Delaware Bay 09:30   Humphrey Sitters: The daily rate of mass gain of Red Knots in Delaware Bay in relation to horseshoe crab egg density and from year to year 09:50   Robert A. Robinson: Mass gain in a spring-staging long distance migrant shorebird,…

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Conserving Wildlife, Delaware Bay, shorebird conservation

20 Years on Delaware Bay: Scarcity and Abundance -Shorebirds Near the Finish Line

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Our latest catch of red knots and ruddy turnstones two days ago ( May 27)  suggests 2017 to be one of the most challenging years of our 20 years of work on Delaware Bay.  It challenged the birds for certain. For example, as of two days, ago ( May 27th) average weights of red knots remain mired in the mid 160’s when it should be in the 180-gram range.    This seems a minor difference but to red knots, it means a flight through the cold and often inhospitable north country of Canada and dropping out of the sky never…

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Conserving Wildlife, Delaware Bay, shorebird conservation

20 Years on Delaware Bay – The Importance of water temperatures, windstorms and shoals

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As we begin our field work on Delaware Bay shorebirds, our 21st season, oddly enough we are once again faced with extraordinary circumstances.   As usual, the birds, after various flight of up to 6  days of nonstop flying,  arrive in emaciated condition.   For example in one catch this week we caught several red knots at around 86 grams far lower than it normal weight of 130 grams.  Putting that into perspective, a women of 145 pounds would tip the scale at 93 lbs while a male of 175 lbs at 113 lbs!  In other words these birds are…

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Conserving Wildlife, Delaware Bay, shorebird conservation

20 Years of Shorebird Conservation and Research on Delaware Bay

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A Monumental Work of Conservation This year marks the 21st year of the Delaware Bay Shorebird Project. As one of the longest running shorebird conservation projects in the world, the only one of its kind in the US, we wanted to memorialize this monumental work. To do so we convened a daylong series of presentations by scientists and managers from all over the world who have worked on the bay.  Here are the abstracts. They are worth a look by nearly anyone interested in shorebirds and Delaware Bay.   DelawareBay_Workshop_Program&Abstract_CWF The presentations ranged widely. We heard talks diving deep into the…

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Bird Study, Conserving Wildlife, habitat management, Science, shorebird conservation

Valuable Creeks and Shoals

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In spite of the very spotty horseshoe crab spawn, the shorebirds on Delaware Bay seem to be gaining weight on schedule.  Below you will find a graph composed of the average weights of all the red knots by our team for the last 20 years. The curve is the result of combining all the data we collected and shows the sweet spot for most knots. As they arrive they take time to gain weight but after about 5 days they start gaining weight rapidly.  After the 26th or so, birds start reaching the critical weights necessary to safely reach the…

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Bird Study, Conserving Wildlife, Delaware Bay, Science, shorebird conservation, shorebird ecology, Uncategorized

Shorebirds out in the cold

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It’s well known that the Delaware Bay shorebird stopover depends on the horseshoe crabs.  Few know that the Delaware Bay is a near perfect horseshoe crab habitat. There are many places on the eastern seaboard where horseshoe crabs breed.  Most are too small to provide sustenance for energy starved shorebirds.  Places like Cape Romain Refuge in South Carolina, have enough horseshoe crabs so that one breeding female unearths eggs of another and thus lays out a tidy meal for shorebirds.  But the areas are small and at this time unimportant to the population of shorebirds. Most of the others are…

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Conserving Wildlife, Science, shorebird conservation, shorebird ecology

20 years of shorebird conservation

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We begin the 20th year of the Delaware Bay Shorebird Project this year with many of the same team members that helped start the project in 1997.  That’s 20 years of studying one of the most intellectually challenging and endlessly fascinating species of wildlife in the world.  Few have had the good fortune to do so.     Unfortunately, we do not start this year with the same shorebird population.  In the last twenty years the Delaware Bay Stopover fell precipitously from its once lofty perch as one of the top three stopovers in the world.  Where once we counted…

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Bird Study, Conserving Wildlife, Delaware Bay, habitat management, Science, shorebird conservation, shorebird ecology, wildlife conservation, wildlife tracking

2015 Delaware Bay Shorebird Banding Season Ends

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All our efforts to help shorebirds on Delaware Bay this year couldn’t have been better rewarded – nearly every red knot left the bay in good condition and in one of the earliest departures in the 19 years of the Project. We counted just over 24,000 knots in our aerial count of the entire Bayshore on May 26th. Just two days later, most had left and we could find only a few hundred, feeding on eggs like human shoppers feed on bargains at a half-price sale. By May 31st, virtually all were gone, along with the ruddy turnstones, sanderlings and…

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Arctic, Bird Study, Conserving Wildlife, Delaware Bay, Expeditions and Travels, habitat management, Restoring Habitat, Science, shorebird conservation, shorebird ecology, wildlife conservation, wildlife tracking

The Red Knots “Vote with their Wings”

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Clive Minton is fond of saying, “the knots vote with their wings” as a way of saying knots concentrate in the best places for knots. Of course it’s true, animals move to the habitats they find most suitable, nature leaves little room for anything but. Sometimes however, animals use a habitat only because they have little choice — in other words, they are making the best of a bad situation. The job of a good wildlife biologist is to understand the difference. Unfortunately, it’s often not obvious. In all the places studied by this author — Tierra del Fuego, the…

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Arctic, Bird Study, conservation policy, Conserving Wildlife, Delaware Bay, Expeditions and Travels, habitat management, Restoring Habitat, Science, shorebird conservation, shorebird ecology, wildlife conservation, wildlife tracking

19,077 Red Knots Observed in New Jersey

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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. This is good news in either of two completely different ways. One explanation is that perhaps most of the knots have already come to…

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Bird Study, conservation policy, Conserving Wildlife, Delaware Bay, habitat management, Restoring Habitat, Science, shorebird conservation, shorebird ecology, wildlife conservation, wildlife tracking

13,000 Red Knots on New Jersey’s Delaware Bay

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We had about 13,000 knots on the New Jersey side of the Delaware Bay (an additional reported 2,000 on the Delaware side of the Bay). Yesterday, we suffered strong NW winds in excess of 20 kts and the birds virtually disappeared. Our daily survey turned up about 6,000 knots, the rest we suspect, finding refuge in Egg Island and Goshen Marshes or with a flyover to Delaware. We will know where they went today. The team will comb the Bayshore for shorebirds with a coordinated ground, boat and aerial survey. The birds gain weight in good time and we expect…

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Bird Study, conservation policy, Conserving Wildlife, Delaware Bay, habitat management, Restoring Habitat, Science, shorebird conservation, shorebird ecology, wildlife conservation, wildlife tracking

2015 Shorebird Migration and Horseshoe Crab Spawn on Delaware Bay

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Thousands of shorebirds now fill Delaware Bay’s beaches and marshes in a determined effort to regain lost reserves with free-for-the-taking fatty eggs of the horseshoe crab. The crab spawn began ten days ago and has gained momentum over the last week as the volume of eggs grows like a well-funded savings account. The eggs surface as each new female crab digs up egg clusters laid by other crabs or as wind-driven waves pound the always-fluid sandy beaches. At least 8,000 red knots slowly get fat on the eggs scattered on New Jersey’s Delaware Bay beaches.   Both crabs and birds…

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Bird Study, Brazil, conservation policy, Conserving Wildlife, Delaware Bay, Expeditions and Travels, habitat management, Science, shorebird conservation, shorebird ecology, wildlife conservation, wildlife tracking

Delaware Bay Shorebird Project Continues for 2015 Season!

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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…

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Bird Study, conservation policy, Conserving Wildlife, Delaware Bay, habitat management, Restoring Habitat, Science, shorebird conservation, shorebird ecology, wildlife conservation, wildlife tracking

The 2015 Delaware Bay Shorebird Project Begins!

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Our 2015 Delaware Bay Shorebird Project began on one of the hottest early-May weekends in memory. Clive Minton, an English-expatriate Australian, and I began the project with an early morning survey of each bay beach – Reeds, Cooks, Kimbles, Pierces, Rutgers, Norburys, Villas – dripping sweat and swatting biting gnats as though it was early June, not early May. The sudden burst of summer weather warmed the bay waters, triggering our first horseshoe crab spawn providing sufficient eggs for newly arriving birds. The birds, on the other hand, followed a more normal schedule. We counted only 400 knots, a smaller…

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