Little grebes and emperor dragonfly’s eggs


On 14 August 2012, I was in the National Park South Kennemerland in the Netherlands.

During the second world war, Dutch forced laborers built an anti-tank defensive line there, ordered to do so by Hitler’s occupying Wehrmacht armed forces. Most of it is a ditch; some of it is a wall. The line was against invading Allied forces, which never arrived.

Now, that line, including the water, is part of a nature reserve.

Little grebes nest there. Little grebes usually eat small fishes. There are no fishes in most of the ditch system. So, the birds eat common newts and leeches instead.

Little grebe, Zuid-Kennemerland, August 2012

I want to thank the photographer of the two pictures in this blog post. The photos were taken last week, but depicted similar situations as on 14 August.

Near the entrance of the national park, carrion crows gather, in an unusually large group for this species.

Near the ditch, a small tortoiseshell butterfly. Flying above the water plants, or resting on them, three damselfly species: blue-tailed damselfly, common blue damselfly, and small red-eyed damselfly.

We pass an abele tree, with a hole in it. Green woodpeckers nested in that hole this summer.

A mushroom: Boletus chrysenteron.

A small copper butterfly sits on the footpath. More on that species is here.

A speckled wood butterfly flying.

Ragwort. St John’s wort.

A common darter dragonfly.

Then, a red-eared slider turtle sitting on a log in the ditch.

Footprints of a deer and a fox in the sand of the footpath.

A small white butterfly.

Great spotted woodpecker sound.

Common toadflax flowering.

On the bank of the ditch again. Many ruddy darter dragonflies; some in semi-heart-shaped love embrace; some sitting on branches.

On this dragonfly and related species: here.

Hemp-agrimony flowers.

Many still very small common frogs on the bank. A common toad in the muddy water.

Willow emerald damselflies.

In the water, coots and a juvenile little grebe swimming. Also, tufted ducks with ducklings. Tufted ducklings are the latest young ducks of summer.

Near its nest, an adult little grebe.

A buzzard calling and flying.

A great tit calling in a tree.

Barn swallows flying.

Lots of songbirds fly to the bank to drink and wash. Great tits, blue tits, a female chaffinch, a male blackcap, icterine warblers.

Emperor dragonfly female, depositing eggs in Zuid-Kennemerland, August 2012

Then, something special. A female emperor dragonfly, flying closely above the water. Every now and then, the “empress” sits down on a piece of wood or water plant to deposit a few eggs under water. Then, she flies on, and deposits a few more eggs elsewhere.

A witch’s hat mushroom. Rather early in the year for this species.

Wild pansy flowers.

Then, the most poisonous mushroom of the Netherlands: a death cap.

Nuthatch sound.

A juvenile song thrush on a branch.

A blusher fungus.

Finally, birch bracket on a birch tree.

Whale shark and sea turtles released in China


This video is called Whale Shark – BBC Planet Earth.

From Wildlife Extra:

Whale shark and sea turtles released off China

Turtles and Whale shark released off Hainan Island

July 4, 2012 – A Whale shark and two Green sea turtles were successfully released off Hainan Island, China. With blue skies above and turquoise waters below, approximately 50 people, including government officials, students, volunteers, local fishermen, and community members, boarded a boat in Lingshui Bay where the animals were set free into their ocean home.

Sea Turtles 911 Founding Director, Frederick Yeh, hailed the day as a celebration of freedom for marine animals, “Sea turtle conservation does not only involve sea turtles. When we protect charismatic species such as Whale sharks, those efforts spill over and protect sea turtles as well. These two animals share the ocean, and we must learn to share the ocean with them.” He added that currently, sea turtles and sharks are endangered entirely due to human-related causes; therefore, “Protecting them is humankind’s responsibility.”

Satellite tags fitted

The Whale shark and one of the sea turtles were outfitted with satellite transmitter tags that will communicate information such as their location, swimming speed and depth, and surrounding water temperatures. Despite being the largest fish in the ocean, very little is known about the life histories of Whale sharks, particularly in the South China Sea. Suzanne Gendron, Director of Ocean Park, announced. The satellite tag will help biologists learn more about their extremely long migration paths, areas in which they feed, and possibly even where they breed, so that conservation efforts are focused in these places.

Whale shark

The Whale shark was a juvenile male measuring 6 metres (20 feet) in length and weighing approximately 1 ton. It is believed that adults can reach up to 20 metres (65 feet) in length and weigh 30 tons. The Whale shark was caught by a Chinese fishing boat and kept captive, a practice we are now focusing on to make sure the sharks are then released, as this one was with a satellite tag.

Whale sharks are listed as vulnerable by the International Union for the Conservation of Nature (IUCN). They are often victims of fisheries by-catch, accidentally caught by fishing boats, or hunted and killed for the value of their large fins to be used in shark fin soup. A traditional Chinese dish, the demand for shark fin soup has increased as China’s economy grows. In recent years ‘shark-finning‘ has become controversial due to the inhumane nature of the catch; caught sharks have their fins sliced off and are thrown back overboard to eventually drown, unable to swim without their fins. It is estimated that approximately 100 million sharks are killed each year for the industry.

Green turtles

The two Green sea turtles were juveniles weighing 30 kg (66 lbs) and 25 kg (55 lbs) respectively. Both had been in residence at Sea Turtles 911′s floating sea turtle hospital for approximately 10 months after being rescued from the illegal sea turtle trade. They were admitted on the same day, both suffering from extreme nutritional deficiencies and weighing a bare-bones 16 kg (35 lbs) each, making their successful dual release all the more special. Green sea turtles are hunted and raised by poachers for their meat, which is considered a delicacy in China.

The event was a collaborative effort between Sea Turtles 911, Hainan Normal University, Ocean Park Hong Kong, local government, and fishermen.

The common ancestor of sharks and humans — and all jawed animals with a backbone for that matter — possessed a sixth sense: the ability to detect electrical fields under water: here.

Michael Sweet, a researcher in the School of Biology at Newcastle University’s Newcastle Institute for Research on Sustainability, has found that while sharks can tan, they are resistant to melanoma: here.

The world’s most endangered turtles and tortoises: here.

Tunisia: Urgent Call to Preserve Marine Fauna in Tunisia and Mediterranean – Stop Killing Sea Turtles: here.