More Costa Rican birds, and moths


Black phoebe, 17 March 2014

Still, 17 March 2014 near Bosque del Paz in Costa Rica. Not only hummingbirds, but also other birds, like this black phoebe.

They behave somewhat dipper-like on rocks in mountain streams. But they are an American flycatcher species, unrelated to dippers.

A golden-browed chlorophonia.

On the other side of the stream, a chestnut-capped brushfinch.

Black guan, 17 March 2014

In a big tree, a big bird, living only in Costa Rica and Panama: a black guan.

Rufous-collared sparrow, 17 March 2014

In a smaller tree, a much smaller bird with a much bigger geographical range: a rufous-collared sparrow.

A collared trogon.

Moth, 17 March 2014

Then, time to switch from telephoto lens to macro lens. From birds to moths which had gathered on the building.

Moth, Costa Rica, 17 March 2014

There are thousands of Costa Rican moth species, and I am far from an expert in these species. So, I know there were various moth species, but not which species.

Moth, in Costa Rica, 17 March 2014

Hawk moth, 17 March 2014

The largest specimens belonged to the hawk moth family.

Hawk moth with two smaller moths, 17 March 2014

Finally, a Central American agouti with a baby on the other river bank.

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Cambrian prehistoric predator evolution, new research


This video says about itself:

26 March 2014

T[amisiocaris]. borealis, an ancient predator, probably used its spiny appendages to sweep through the water for prey and then bring it into its mouth, as these animations show. Credit: Martin Stein. Read more here.

From Wildlife Extra:

Large ocean predators evolved into gentle giants 520 million years ago

April 2014: Large marine creatures that roamed the Earth’s oceans more than 520 million years ago have been found to filter food from the water in a similar way to today’s blue whales and evolved into a gentle sea giant from a large marine predator that feasted on large prey, say scientists.

Newly discovered fossils from North Greenland showed that these ancient giant marine animals used bizarre facial appendages to trawl for nekton and plankton from the seas.

The North Greenland fossil, called Tamisiocaris, was a member of the iconic anomalocarids group of early marine animals which roamed the Cambrian and later Ordovician oceans. They swam using a set of flaps down either side of the body and probably captured large prey with specialised grasping appendages in the front of the mouth.

The team demonstrates that the Tamisiocaris had evolved into a suspension feeder by modifying its grasping appendages into a filtering apparatus that could be swept like a net through the water trapping small crustaceans and other organisms as tiny as half a millimetre in size.

The research, funded by the Agouron Institute, Carlsberg Foundation and Geocenter Denmark, was led by the University of Bristol and also included researchers at Durham University, the University of Bath and the University of Copenhagen.

As well as shedding light on the evolution of the Tamisiocaris, the researchers said their discovery also showed how productive the Cambrian period was and how vastly different species of anomalocarids evolved at that time. It also provides further clues into the ecosystems that existed hundreds of millions of years ago, they said.

Study lead author Dr Jakob Vinther, a lecturer in macroevolution at the University of Bristol, said: “The fact that large, free-swimming suspension feeders roamed the oceans tells us a lot about the ecosystem.

“Feeding on the smallest particles by filtering them out of the water while actively swimming around requires a lot of energy – and therefore lots of food.”

In order to fully understand how an anomalocarid could have fed, Dr Martin Stein from the University of Copenhagen, Denmark, created a 3D computer animation of the feeding appendage to explore the range of movements it could have made.

Dr Stein said: “Tamisiocaris would have been a sweep net feeder, collecting particles in the fine mesh formed when it curled its appendage up against its mouth.

“This is a rare instance when you can actually say something concrete about the feeding ecology of these types of ancient creatures with some confidence.”

The research about this was published here.

April 2014: An international team of researchers from the US, China and the UK have discovered the earliest known cardiovascular system in fossilised remains of an extinct marine shrimp that lived over 520 million years ago. The finding sheds new light on the evolution of the body in the animal kingdom and shows that even the earliest creatures had internal systems that strongly resemble those found in their modern descendants: here.

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Bee digging nest, video


This video says about itself (translated from Dutch):

8th April 2014

Andrena vaga is a solitary bee, rare in the Netherlands. Only the females dig a nest, and they mainly feed on willow pollen. Filmed by René Peeters.

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Costa Rican frogs and spiders


Green-and-black poison frog, 17 March 2014

After yesterday, in the morning of 17 March 2014, still near the Sarapiqui river in Costa Rica. One of many animals there is this green-and-black poison dart frog.

Red-eyed tree frog, 17 March 2014

While a red-eyed tree frog was asleep under a leaf.

Masked tree frog, 17 March 2014

There was a masked tree frog as well.

Golden silk spider, female, 17 March 2017

In a big web, a golden silk spider couple.

Golden silk spider female, 17 March 2017

The female was much bigger than the male.

Golden silk spider male, 17 March 2017

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Stag beetles fighting, video


This is a video about two male stag beetles fighting near Bingelrade in Limburg province in the Netherlands.

Ien Rutten made the video.

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Frog and reptiles in Costa Rica


Strawberry poison dart frog

As I reported, we were near La Selva Biological Station, Costa Rica, on 16 March 2014. There was a strawberry poison dart frog.

Green basilisk, 16 March 2014

A green basilisk.

Crested guan, 16 March 2014

Crested guan in a tree.

Great curassow in a tree nearby.

While on the ground, there is busy traffic on leaf-cutter ant highways. In one direction, ants bring back pieces of leaf to their colony. In the opposite direction are the ants which yet have to get a piece of leaf.

Ground anole, 16 March 2014

On a piece of leaf along the rainforest path, a ground anole lizard.

Central American whiptail lizard, 16 March 2014

A Central American whiptail lizard later.

Mantled howler monkeys call.

A black-throated trogon on a branch.

A dusky-faced tanager.

We went back to the entrance. Stay tuned!

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Rainforest sloths and toucans in Costa Rica


This video says about itself:

Filmed at Selva Verde Lodge in Costa Rica, this Nikon’s BATV episode features the plight of the Great Green Macaw.

A list of birds at Selva Verde is here.

Costa Rica, 16 March 2014.

After yesterday, we were near the Sarapiqui river.

At 4:50 the sound of mantled howler monkeys woke me up.

An orange-billed sparrow after getting up.

From the bus: a great-tailed grackle. A great kiskadee on a wire.

Near the entrance of La Selva Biological Station: a chestnut-sided warbler on a tree. A species, nesting in North America and wintering here.

In other trees, a green honeycreeper. A pied puffbird.

A boat-billed flycatcher.

Masked tityra male and female, 16 March 2014

A masked tityra couple. On the photo, the male on the left; the female on the right.

Golden-hooded tanager, 16 March 2014

A golden-hooded tanager.

A buff-throated saltator cleans its feathers.

So does a social flycatcher.

A group of red-lored parrots in yet another tree.

In the same tree, a juvenile Baltimore oriole cleans its feathers.

Keel-billed toucans, 16 March 2014

Keel-billed toucans. The second biggest toucan species in Costa Rica.

Keel-billed toucan flying, 16 March 2014

A crested guan.

On wires: greyish saltator. A female shiny cowbird. A tropical kingbird. A grey-capped flycatcher.

Mangrove swallow, 16 March 2014

Two mangrove swallows.

A northern rough-winged swallow flying.

Rufous-tailed hummingbird, 16 March 2014

A rufous-tailed hummingbird.

In a tree, a long-tailed tyrant. A plain-coloured tanager cleans its feathers.

A small flock of chestnut-headed oropendolas flies past.

On a branch, a tropical pewee.

Bananaquit. Variable seedeater.

A green iguana in a tree.

A slaty-tailed trogon couple nests in a termite nest in a tree close to the entrance. The birds are enlarging their nest. The termites don’t mind them. After the resplendent quetzal, slaty-tailed trogons are among the biggest trogon species.

Band-backed wren, La Selva, 16 March 2014

A band-backed wren. The bird on the photo was banded for research.

Brown-throated three-toed sloth, 16 March 2014

In a tree, a brown-throated three-toed sloth with a baby.

Brown-throated three-toed sloth with baby, 16 March 2014

A broad-winged hawk flying.

Near a bridge across the river, greater white-lined bats resting.

A collared peccary on a lawn on the other side.

Collared aracari, 16 March 2014

And a collared aracari in a tree.

And the biggest woodpecker species of Costa Rica: a pale-billed woodpecker.

A much smaller bird: an olive-backed euphonia.

There were not only birds, but also reptiles and amphibians there. So, stay tuned!

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New jellyfish discovery in Dutch Wadden Sea


This video is called Diving with JAGO: jellyfish / Medusae perform their gorgeous dances.

The Dutch Wadden Sea Society reports that a jellyfish species, new for the Netherlands, has been discovered.

Mitrocomella polydiademata was found near the Balgzand.

This rare species does not have a Dutch name, or an English name, yet.

Very little is still known about the way of life of this species, and its relatives, the Medusae jellyfish. So, research will continue.

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Robin singing, butterfly flying at cemetery


This video is called Brimstone Butterflies; Gonepteryx rhamni.

Now, a wildlife report.

This time, not from Costa Rica (many more will appear on this blog, but thousands of photos, some good, some not so good, still have to be sorted out. So, please be patient).

Today, I went to the cemetery not far away.

A chaffinch sings.

A wood pigeon flies into a tree.

A blackbird sings.

Two carrion crows in a tree.

Great spotted woodpecker sound.

Nuthatch sounds. One of them climbing on the lower part of a small tree.

A chiffchaff sings.

A jay on a tree.

A brimstone butterfly flying.

Great tit sound.

A robin sings from the top of a tombstone close to me.

Nine magpies together in a treetop.

As I leave, a male chaffinch on the ground.

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