A different kind of woodpecker

A green woodpecker in Nowhere Wood
A green woodpecker in Nowhere Wood [photograph: Andrew Town]

If you look carefully at this image, you can see another woodpecker, but one that is quite different to the great spotted woodpecker that starred in our last story. This is a green woodpecker. Can you see why?

 

 

 

These two kinds of woodpecker are able to live together all year round in the wood, without getting in each other’s way. This is because they have different lifestyles.

AI generated woodpecker
An AI generated render of a green woodpecker

This AI generated image of the green woodpecker shows its special characteristics: the green feathers on the back and wings and the paler feathers on the belly. The red head and the black ‘moustache’ around the beak. Males have a red centre to the moustache, so this image is of a young female.

 

 

She has a sharp beak , like the great spotted woodpecker. Male green woodpeckers also use their beaks to dig holes for nesting sites.

A green woodpecker digging a nest in Nowhere Wood.
A green woodpecker digging a nest in Nowhere Wood. [photograph: Andrew Town]

 However, male green woodpeckers sing a special call to attract females to their nests. The call sounds like the woodpecker is laughing, and the bird is sometimes called a ‘yaffle’ or ‘laughing Betsy’. You can the various calls of the green woodpecker, here.

 

 

Unlike, the great spotted, the green woodpecker does not feed on insects found on the tree. Rather, it hunts for the ants that live in the open spaces near the wood. You might see them in the meadow that runs alongside the wood.

It is these differences in appearance and lifestyle that mean that the two woodpeckers can life happily alongside each other in the wood all year round.

  1. Green and great spotted woodpeckers have different ways of feeding. How does this help them to live alongside each other in Nowhere Wood?
  2. What might happen if they shared the same food supply?

 

 

Notes on the story

The sustainable park

Hard hats, safety specs and camouflage jackets

It is a January morning, misty and still. The air hangs silently in Nowhere Wood. Suddenly close,  but just out of sight, a loud and fast drumming shakes the stillness. Then a silent pause, followed by a quieter drumming coming from the other end of the wood.

Let’s find the first drummer. He’s hard to see, high up in the tree, but there he is, pressed against the tree trunk: a male great spotted woodpecker. The other drummer in the distance is a young female. The woodpeckers are having an adventure in Nowhere Wood.

A female great spotted woodpecker approaching her young in Nowhere Wood.
A female great spotted woodpecker approaching her young in Nowhere Wood. [Photograph: Andrew Town]

Our male is digging a hole in his tree, hoping to impress the female. If it works, she will lay their eggs in the hollow space in the tree. This photograph, taken a few weeks later in Nowhere Wood,  shows the new mother feeding her fledgling chick.

How can these woodpeckers drill such large holes in trees without injuring themselves? Well, it looks as if all parts of their bodies have special characteristics that enable the birds to do this. Scientists call these special characteristics, adaptations.

Look at this video of a great spotted woodpecker pecking at a tree. Look at his  feet. He has three toes on each foot, with two toes facing forwards to grip and hold onto the tree trunk. This prevents him falling off when he pecks the tree! The beak is made of a tough material that keeps growing and keeps the beak sharp.

The adaptations to the skull and tongue of the woodpecker
The adaptations to the skull and tongue of the woodpecker

His skull is especially strengthened, like a builder’s hard hat. The brain presses right up against it and cannot move around.

The tongue extends backwards into the head as a long thin tube of bone and cartilage that runs right round the inside of the skull of the woodpecker. This acts like a seat belt, holding the brain in place.

The tongue is especially long and sticky, so it can go right into the tree holes, searching for insects.

Close up of the woodpecker
a close up of a woodpecker

The eyes fit tightly inside the skull, and do not vibrate whilst the bird is pecking. Their eyes have a special transparent membrane that closes across the front of the eye to prevent splinters of wood scratching the eyes. The feathers around the eyes and beak also stop wood reaching the eyes. Together, they act as safety spectacles!

Finally, a woodpecker is quite vulnerable to attack by larger birds when it is drumming against the tree. The patterns of lines and stripes act  like a camouflage jacket, making the bird hard to see against the tree surface.

  1. Woodpeckers have a lot of adaptations to help them to survive in Nowhere Wood. This story contains a photograph that suggests that the woodpeckers are living successfully here. What does the photograph tells us about the future of woodpeckers in Nowhere Wood?
  2. Woodpeckers have developed these adaptations through evolution.  Charles Darwin is the scientist who first suggested a possible way evolution could happen. This is called natural selection. Find out what natural selection is.

Notes on the story

A different kind of woodpecker

The greening of Nowhere Wood

It is a cold and wet April in Nowhere Wood, which is full of birdsong and flowers.

The trees are becoming green with new leaves. Leaves grow silently that we can miss their unfolding, noticing only when they are fully opened. If you look carefully, you can see new leaves opening today.

New leaves grow from buds. Buds are covers that protect the developing leaves from damage during the frosty winter days.

New horse chestnut leaves - Spring 2024 new leaves are a special shade of green

 

 

 

 

 

 

 

New leaves are a special shade of green called Kelly Green. Later in the year the leaves become a darker shade of green.

 

 

 

 

 

 

 

  1. Why do plants make new leaves during the summer, ready for the next spring?
  2. What happens to these new leaves in the autumn?

Read more about leaves in the A year in the life of a sugar factory.

 

If a tree falls…

What is a frog?

Frog spawn in Nowhere WoodIt is late February, the cold weather has moved away and the frogs have moved back in. It’s been a couple of years since they were last here, but here are their newly-laid eggs and the female is hiding beneath the leaf in the top left corner of the photograph. What is a frog and how is it having adventures in Nowhere Wood?

Frogs are amphibians, animals with backbones that live for most of the year on land, but which have to return to water to breed. A female with eggs is popular with males, which compete with each other to get close to her.

When she releases here eggs into the water, the males release their sperm onto the eggs. Fertilisation takes place in the water. The female lays about 2 000 eggs and many of them die. The brown eggs in the top photograph are probably a clutch of eggs that have died.

 

 

 

Inside the egg, the embryo is growing into a juvenile tadpole, feeding on the jelly that surrounds it. It will grow a tail and gills and become a free swimming tadpole. Soon, the tadpole will break free and have to make its way as an independent animal, all of the while developing into the adult frog.

There are dangers in the water: tadpoles become carnivores and will eat each other and there are other predators, too. There is also a real chance that the water in the pond will disappear if we have a prolonged dry spell.

The frogs in Nowhere Wood are having adventures, moving forward into an unknown future, with no certainty of success. Most of these eggs will be eaten and will become food for other organisms; one or two might survive. Most years, frogs return to the water to breed, as frogs everywhere have done for the last 265 million years.

1. The survival of the frogs is not just due to chance. There is competition between male frogs to get close to the females eggs. How does this help to increase the success of the mating?

2. There is also competition between tadpoles for food. How does this help ensure that some frogs will survive to become adults that can reproduce for themselves?

3. What, do you think, is a frog?

Frog news update:

One week on, and the spawn has floated to the edge of the pond and the adds are swollen because they have taken up water. They still look healthy. Fingers crossed for the next stage!

 

 

Early risers!

The singing trees

ice freezes the pondWinter has come to Nowhere Wood and ice has formed around the fallen trees in the pond. Everything shivers and wood is silent again. Squirrels search for food in the frozen mud, but everything else is waiting, biding its time.

 

 

 

Silent, except for an ancient overgrown hedge formed from a row of old trees, bound together into a thicket by generations of bramble stems. These trees are singing, for this is the home of the tree sparrows. The trees are just outside the wood, next to a path much used by dogs taking their owners for a daily walk.

 

 

 

The tree sparrows are warm, protected from the icy wind by the layers of dead branches that surround them. Impenetrable, they are hidden amongst the branches, out of harm’s way. In this forgotten place, they thrive and they sing.

 

Well not quite forgotten. In the garden of a house, less than 10 metres from the singing trees, is a garden with a bird feeder, filled daily by its residents. The sparrows dart from the hedge to the feeder and then back again, hour after hour, making sure they do not go hungry.

 

Small acts of kindness can make a big difference to the birds in Nowhere Wood. These ancient hedges are important, too, as wildlife corridors, joining ancient woodlands together, giving animals a chance to move safely across the landscape.

  1. Why are the ancient hedges such a good place for the tree sparrows to live?
  2. Why are bird feeders so important in the winter months?

Spring is coming!

the shortest dayNowhere Wood on December 23rd was silent and still. The wood was in midwinter, at its furthest point from the Sun on its journey through the seasons. At only 7 hours and 49 minutes, this was the shortest day  and darkness ruled the wood. From now onwards the days will get longer by about two minutes each day until midsummer’s day in July.

new born squirrelsThe air was was misty and damp. No birds sang. The only movements were from ten or more baby squirrels running up and down trees, looking for food. The plentiful acorns in the autumn gave their parents the nutrients the needed to produce a special autumn litter.

 

Even by January, the wood had moved onwards and the days were drawing out. Robins sang from high branches of trees, marking out the wood into their territories, preparing for the coming spring.

 

 

Jackdaws and magpies fought for the right to control the high airspaces and the food that the neighbouring houses throw away. The wood was bustling with movement and sound.

 

 

Today is February 1st, the day that the Celtic peoples call Imbolc, the first day of spring. The flowers are opening and the frogs will soon return to our ponds to breed. Look upwards to the sky.

Spring is coming!

  1. Think about the acorns that filled the floor of Nowhere Wood in September. How have they led to the birth of the new squirrels?
  2. What changes have you seen in your neighbourhood in the last few weeks since January?

What is a frog?

A year in the life of a sugar factory

The leaves of plants are everywhere in Nowhere Wood, helping to keep the wood alive. Leaves are organs: collections of living tissues and cells, having adventures in time and space. This is the story of a year in the life of an oak leaf.

Leaves are factories for making sugar from sunlight, water and carbon dioxide from the air. No human factory can do this, which is why we, and all other organisms, are so dependent on plants. Leaves are the producers of food.

In is late November and the cells that will divide to make the new leaf are protected safely inside the scales of the bud. Early in March, when the days warm and get longer, stem cells within the bud start to divide many times, producing all of the cells of the new leaf. To start with, the cells are very small and all look the same.

Soon, the cells take up water and get much larger. They escape the protection of the bud and the new leaf emerges. The new cells no longer look the same: they are on different journeys of development, becoming all of the different cells and tissues that make up the leaf.

 

The leaf is a factory for making sugar. Like any factory, it has a source of energy and transport systems to get the raw materials into the factory.  It also moves the manufactured sugar out to the places in the plant where it is needed. The heart of the factory is the production line where sugar is made. These are called chloroplasts and the leaf has millions of them, all making sugar whenever the sun shines. The Spring and Summer are sugar making seasons.

Gradually, in the autumn, when the days get cooler and shorter, the sugar factories are shut down and abandoned. The chloroplasts lie in ruins as everything useful is recycled back into the branches of the tree. All that remain are the frameworks of cell walls, turning brown as they dry in the autumn air.

 

Finally, the oak tree makes a special layer of cells that separates the old leaf from the stem, and the leaf is ready to fall when the wind blows strongly. The fallen leaves are not wasted, becoming energy stores for the organisms that feed on them. Next year’s buds are forming and wait for spring and the production of new leaves.

If leaves are factories form making sugar, then trees are factories for making leaves.

Everything has its own season in Nowhere Wood.

  1. Think about how the leaf is a factory for making sugar. Where does its energy store come from? How do the raw materials get to the production line?
  2. The production of leaves is sustainable in Nowhere Wood. What do you think this sentence means?

Subterranean superheroes