Fascination of plants day – Spring in its best

Thanks to Tim from Notes of Nature :) , I discovered that May 18th was supposed to be the First international “Fascination of Plants Day” . There is one thing for sure : in the heart of the European Union, Brussels, there was very little publicity for the event! :(

Many activities were organized in European countries, and here in Brussels, le Jardin Massart (on which I had made a previous post here, introducing a bizarre parasitic plant) was exceptionnally open on a weekend day…a very nice opportunity to discover the late Spring flowerings.

The Jardin Massart is divided in two parts : one being a botanical garden, the other a Natura2000 reserve. Located on the edge of Brussels, it’s home to rare species and encompasses remnants of the humid meadows which used to surrounder the city. The visit was a wonder for the eye as you can see!

The golden buttons of Buttercup mixed with the delicate flowers of Ragged Robin (Lychnis flos-cuculi) or the tender pink spikes of Bistort (Persicaria bistorta) form a beautiful picture.

Even in Brussels, there still are some places to see wild orchids! This one, which has many purple spots on its leaves is the western marsh orchidDactylorhiza majalis (majalis meaning May in latin..there we come! :D ).

On Cuckoo flower (Cardamine pratensis), I managed to snap this lovely little one. It’s called Cauchas rufimitrella, and belongs to the Fairy long horn moth family (aah, English names are so evocative! :D ) because of its very long antennae (the body is only 1 cm long). And what a big surprise…the adult lays its eggs on the seeds of the cuckoo flower!

Now if you’re tired of pink flowers, white ones are not absent from this little meadow! Check for example Ornithogalum umbellatum (Star-of-Bethlehem), a relative of hyacinths, which displays lovely star-shaped flowers.

Finally, a yellow one which looks rather “normal”…but beware! In an earlier post I had introduced Lathraea clandestina, a holoparasite (no “green parts”, no photosynthesis…the plant has to take everything from its host).
On the contrary, the yellow one pictured here, Rhinanthus angustifolius (the Greater Yellow-rattle), is a hemiparasite (like the well-known Mistletoe). “holo” meaning “all”, and “hemi” meaning “half” in greek, I let you imagine the rest! It’s green, so it can photosynthesize and survive on its own, but it grows much better when there is a host to provide water and nutrients.

You might be wondering what good parasitic plants can do in an ecosystem, and you would be right, it has been bothering scientists for a long time! It seems that these plants work as ecosystem engineers, acting as buffers between soil, plants, insects and fungi. For instance, they decrease herbivory of host plants by snails, and help in attracting pollinators. They can also suppress the growth of grass species, which enables the growth of smaller plants and thus increases biodiversity. Interesting, isn’t it? :P

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Unexpected biodiversity : the cemetery episode

When you think of cemeteries, you usually think of sadness, gloominess and death. But cemeteries are also peaceful and quiet places, where plants and animals can thrive with little disturbance…

I visited the Cimetière de Schaerbeek (which is one of the 19 municipalities of Brussels) with scientists from the AEF (a Belgian association which studies botany and floristics), and discovered a rather unexpected biodiversity.
The cemetery is famous for holding the grave of what is probably the most famous Belgian painter, aka René Magritte. For those who don’t know, he was obviously a strange guy, and a great ambassador of surrealism. I would have expected his gravestone to be more…imaginative, though!

In the wooded areas, the wet soil (in April, we’ve had three times the ‘normal’ amount of rainfall!) hosts many different species of mosses. I hope I could ID those as easily as plants!

Between the tombstones, the stony and drier soil is home to small inconspicuous plants like Aphanes arvensis (Parsley-piert) which is very rare in Brussels or this lovely little Geranium with rounded leaves (Dovesfoot Cranesbill, Geranium molle).

There was also many individuals of this gaunt-looking plant, which has ridiculously long stems, small white flowers and hairy leaves at the base. Has anyone guessed what this could be?

No? Then I’ll give the answer : it’s Arabidopsis thaliana (Thale Cress), the plant used as a model in genetics labs all over the world, the first plant to have its complete genome sequenced in 2000. Surprising, isn’t it? :D

Now good news for biodiversity? Montia minor (a kind of Blinks) is showing a considerable increase in its distribution range in Belgium. In the past few years, it has been discovered in many new places, and it seems to thrive in urban environments like Brussels. This cemetery is the newest addition to the range of places where it can now be found!
Unfortunately it’s so small that it’s quite a pain to photograph…
A companion of Montia minor is Rumex acetosella (sheep’s sorrel) which has quite remarkable arrow-shaped leaves. It’s also edible (soups, sauces), with a bitter taste due to oxalic acid…I didn’t try though :D

The next area of the cemetery is made of large lawns where ashes can be scattered. We found  several interesting species there, like the creeping Ornithopus perpusillus (Bird’s-foot) pictured here, or the Field Wood-rush (Luzula campestris).

The walking paths are made of ballast-like rocks. Unlike in many other places in Brussels, they don’t seem to be spraying weedkillers here, so we can still see this characteristic drought-resistant vegetation : Erodium cicutarium (Common Stork’s-bill), Sedum acre (Biting Stonecrop)…

Fauna is not absent from the cemetery! There are a lot of birds (I even saw a Green Woodpecker), insects and…rabbits, many rabbits! A cute little one I managed to snap between two trees :)

 

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Bat Friday

Tonight was my first bat walk with Plecotus (the bat group of the Walloon nature association Natagora) and the local association CCN Vogelzang in the Vogelzang reserve, South-West Brussels.

I won’t show you any pictures because night photography and compact cameras are not really good friends :D …but this is a very beautiful place surrounding a small river, with pastureland, meadows, hedges and old farms. It’s also the last sanctuary for the Little Owl (Athene noctua) in Brussels.
Armed with a Batbox heterodyne detector like this one, we wandered through the reserve, trying to hear and maybe see some bats.

Seeing them proved to be difficult, because there was little light, and bats tend to avoid flashlights. However, with the detector, it’s quite easy to know if there are some bats around. Here they seemed to be concentrated around ponds, along the river and also doing round-trips along the hedges. Most bats appeared to be hunting alone (if the bats are too close, they have to shift their ultrasound frequencies so they won’t disturb each other..and you can hear it with the detector).

The sound was louder at 45 kHz, so it’s probably the Common Pipistrelle (Pipistrellus pipistrellus), which is the most common bat in Brussels (and in urban environments in general) and the smallest (3,5 cm long, weighing as much as a sugar lump!). Here you go :


At 0:09, you hear a characteristic ‘bzzz’ sound…called a feeding buzz. When the bat moves closer to an insect, the echo takes less time to come back. If the bat wants to locate the insect precisely, it needs to produce very fast ultrasounds. The two schemes from Jon Russ book, “The Bats of Britain & Ireland” illustrate this very well. The left one shows “normal” ultrasounds emitted by a Pipistrelle, the right one shows a “feeding buzz”.

We also heard a 20 khz, lower ultrasound which could be the Common Noctule (Nyctalus noctula), much larger than the pipistrelle (8,5 cm).


A nice and interesting evening! I can’t wait for the two other training days on bats which are coming :)

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Who said big insects are only found in the tropics?

On Sunday, despite the windy, cloudy and rainy weather, I decided to take part in a guided training walk organized by two Belgian naturalist associations (CEBE & Cercles des Guides-nature du Brabant). The theme was “late spring flowerings” and the location a very interesting humid reserve in Eastern Brussels called ‘Hof Ter Musschen’ (‘Sparrows farm’).
There were indeed some interesting flowerings like the Water Forget-me-not (Mysotis scorpioides, lovely flowers as you can see!) or the Ragged Robin (Lychnis flos-cuculi).

The walk really got thrilling when I discovered that big guy, sleeping on Cow Parsley (Anthriscus sylvestris). It’s a male Poplar Hawk-Moth (Laothoe populi), with a wingspan of 9 cm. The adult do not feed, and lay their eggs on poplar of course, but also willow, alder or elm. Doesn’t it look beautiful?

In the marshy zone, I managed to catch that 5 cm centipede. They are powerful predators of other insects, and their bite can be dangerous…but not in the case of temperate species. Don’t worry…holding it on my  hand was not risky! I would not advise to do the same with the 20-cm long one on the right, seen on Borneo ;)

On Monday, near my hometown Thionville, I spotted those two beautiful Longhorn beetles who where actively mating on a stone wall. They were about 10 cm long, so not really the kind of insect you would be expecting in the French countryside!

Other examples of large insects found in our climates are the European Rhinoceros (Oryctes nasicornis, 5 cm long, massive beetle) or the Brown Hawker Dragonfly (Aeshna grandis, and its impressive 12 cm wingspan).

Who said big insects were only found in the tropics? I think we have our share too! :D

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Mass emergence day

Yesterday, while talking a walk around my garden pond, I was surprised to see huge amounts of damselfly exuviae on the aquatic plants. The white filaments are the old tracheal gills that the larvae used to breathe underwater.

When I say “mass emergence”, I mean it…I managed to count 37 of them on a single plant (a Horsetail) ! They all belong to the same species, Pyrrhosoma nymphula (the Large Red Damselfly), which is usually the first one to emerge.

The adults were perched on almost every tree and hedge plant in my garden. They tend to stay in the sun for a few hours until their wings are dry and hard enough to fly.

The funny thing is that none of those had emerged on Thursday. I could see the larvae in the water, but no exuviae. I guess yesterday was the perfect emergence day in terms of temperature, humidity and sunlight!

Even more bizarre is this droplet-shaped larvae with a siphon at the end. I have absolutely no clue on what it could be and I’m waiting for specialist answers! Nature is sometimes pretty weird :D
EDIT : answer came from the specialists on that great forum (in French, sorry : http://www.insecte.org/forum/). It’s the pupa (stage after larva) of a marmelade hoverfly (Episyrphus balteatus). Another mystery solved :)

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This is not a snake

Last week-end, as each year before May 1st, it was time for a small stroll in the forest to pick some Lily of the Valley flowers (aka Convallaria majalis…sorry, I can’t stop putting latin names everywhere :D )

While walking on forest tracks, my father almost stepped on that poor thing! About 40 cm long, bathing in the late afternoon sun was this strange snake-like looking animal…which is actually not a snake!
It’s called slow worm in English, orvet in French or Anguis fragilis in latin and it’s in fact a limbless lizard.

Unlike snakes, the slow worm possesses moveable eyelids. It is pretty slow moving, hence the name and it’s absolutely harmless (and a precious ally to gardeners, because it feeds on slugs and snails). It also has the strange ability to perform autotomy (it can voluntarily shed its tail to escape predators, but only once in its life time).

I still can’t decide if it’s a male or female though….female are supposed to have a thin dark line on their back (which is obviously not the case for mine), but males are more uniform in colour, and greyish….any thoughts on that?

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Ode à la Plaine

Comme certains lecteurs le savent peut-être, le campus de la Plaine est en passe de perdre sa quiétude…et pas mal de biodiversité!

Les explications et détails du projet sont donnés dans ces deux sites :
http://laplaine.jimdo.com et http://triomphe-bxl.jimdo.com
mais voilà un bref rappel concernant la situation.

Les terrains de la Plaine regroupent un campus double (deux universités : ULB et VUB), mais aussi l’Ecole européenne d’Ixelles ainsi que la caserne de pompiers d’Auderghem. En 2007, l’ULB a vendu environ 85000m² de terrains qui lui appartenaient à deux sociétés immobilières. Deux projets ont fait l’objet de demandes de permis en février 2012 : l’un a l’arrière de la caserne de pompiers (Universalis), l’autre le long du boulevard du Triomphe (Eckelmans).

Voilà deux images extraites du site qui donnent une idée de la situation :

Je sais bien qu’il est impossible de sauvegarder tous les espaces verts de Bruxelles, et vert ne veut pas forcément dire biodiversité à préserver. Nénanmoins, dans le cas de la Plaine, on peut s’interroger sur ces constructions :

1) La Plaine est le plus grand espace vert présent sur le territoire de la commune d’Ixelles. Un certain symbole…sauf pour la commune visiblement.

2) Quand on sait qu’il y a  plus d’1,2 millions de m² de bureaux vides à Bruxelles, pourquoi en rajouter 65000 m² ? Quand on sait que beaucoup de ces bureaux vides pourraient être transformés en logements, et que les logements du projet Universalis ne seront pas destinés aux étudiants, sont-ils vraiment nécessaires ?

3) Ce site doit pour moi rester fait pour des étudiants. Sur le temps de midi, nombreux sont les étudiants et les élèves de l’Ecole Européenne qui viennent s’y promener et s’y défouler. En soirée, bien sûr, la Jefke et la BSG font vibrer les foules. Je n’imagine pas les problèmes engendrés si le site se dote de bureaux et de logements privés.

4) Quid de la biodiversité? Le projet Universalis nous promet des replantations, des pièces d’eau. Mais combien d’arbres arrachés, combien de plantes détruites par les camions de chantier, combien d’animaux déplacés et qui ne reviendront plus (perte d’habitat, nuisances sonores, toujours plus de voitures) ?

Quelques panoramas du jour :

Et la biodiversité du site, en quelques pas :

L’aubépine à un style (Crataegus monogyna) et la clématite des haies, grimpante (Clematis vitalba)

La Patience à feuilles obtuses (Rumex obtusifolius) et le gratteron (Galium aparine)

Le fraisier sauvage (Fragaria vesca) et le groseiller (Ribes rubrum)

Un beau tapis de podagraire (Aegopodium podagraria) ou encore de véronique à feuilles de lierre (Veronica hederifolia)

Mais la Plaine, ce n’est pas que des plantes, c’est aussi de nombreux animaux souvent discrets, mammifères ou insectes.

Ici un bibion (Bibio marci ou mouche de la Saint-Marc, qui apparait aux alentours du 25 avril) et un hyménoptère non identifié, avec ses 3 petites ocelles sur la tête.

Un mille-pattes non identifié et une magnifique (quoi, vous ne trouvez pas? :D )  tipule de 5 cm

un drôle d’escargot allongé (Clausilia sp.) accroché à un tronc de sureau et un étrange mille-pattes (Polydesmidae) qui possède des sortes de plaques sur chaque segment.

Une méchante coccinelle asiatique et une gentille coccinelle de chez nous (Propylea quatuordecimpunctata), espèce d’ailleurs protégée en Flandre.

D’ici quelques mois, tout ceci ne sera peut-être plus que des souvenirs…alors agissez!

Signez la pétitionhttp://www.lapetition.be/en-ligne/Sauver-les-espaces-verts-de-la-Plaine-Ixelles-9238.html
Envoyez la lettre de contestation fournie icihttp://laplaine.jimdo.com/

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Parc Walckiers…un joyau menacé

Il est de ces endroits oubliés, qu’on découvre un jour un peu par hasard, et qu’on n’oublie pas de si tôt… Le Parc Walckiers en fait certainement partie!

Situé sur la commune bruxelloise de Schaerbeek, ce petit parc (4,5 hectares), accessible uniquement lors de visites guidées recèle une flore et une faune remarquable. C’est par exemple un des derniers refuges du lérot (Eliomys quercinus) à Bruxelles.

Ce parc est en fait la partie orientale de la réserve naturelle du Moeraske, dont je vous avais déjà parlé ici : http://naturanaute.com/2012/03/01/un-champignon-rose/. , et possède un historique assez original. Les détails sont ici, pour les passionnés d’histoire (http://www.cebe.be/website/a_cebe/b_patrimoine/walckiers.php?lng=fr), mais en résumé on peut dire qu’il s’agit d’un parc établi au XVIIIème siècle, successivement remanié, modifié, amputé et laissé à la nature depuis les années 1960. En 2000, le site a été classé en zone verte à haute valeur biologique, ce qui donne une idée de sa richesse.

J’ai eu la chance de le découvrir lundi passé au cours d’une excursion avec l’Association pour l’Etude de la floristique (http://www.aef-flor.be/), et je ne résiste pas à partager quelques photos! Voilà la situation du parc dans Bruxelles, et le tour réalisé :

La marche commence par un passage dans une fûtaie peuplée de Corydalis solida à présent en fruits. Sur les érables sycomores, on remarque de jolies galles rouges, sûrement causées par la ponte d’une espèce d’acarien, Aceria macrorhyncha. Des vestiges de l’ancien parc à l’anglaise subsistent encore, comme ce monument funéraire en mémoire d’un des propriétaires (XVIIIème siècle).

On arrive ensuite à une petite prairie humide, dominée par des graminées. Au bord de l’eau, le populage des marais (Caltha palustris) nous offre ses grandes fleurs jaunes. Notez la couleur verte de l’eau, en fait recouverte de lentilles d’eau (Lemna sp.). Ces plantes flottantes peuvent indiquer une eutrophisation de l’eau (excès de nitrates), et être dangereuses pour la faune et flore aquatique car elles empêchent la lumière de passer.

Sur mon jean, un chironome (Chironomidae). Proche des moustiques (mais lui ne pique pas), il a lui aussi une larve aquatique et se distingue par ses délicates antennes plumeuses (c’est donc un mâle!). Toujours chez les Diptères (mouches au sens large), ce joli syrphe (Syrphus sp.) posé sur une feuille d’ortie.

Plus loin, nous arrivons à une sorte de petite vallée, bordée de sureaux. Encore des  vestiges du parc paysagé, avec un tunnel surmonté d’une obélisque…couverte de tags (bienvenue à Bruxelles :( )

Dans cette vallée, on remarque de nombreuses mousses, comme par exemple la rare Thamnobryum alopecurum ou encore cette autre mousse non identifiée.

Nous dépassons une prairie bordée de robiniers pour retourner dans une partie plus boisée, avec des arbustes comme Ribes rubrum et Ribes uva-crispa (les groseiller rouge et épineux). Les Gouets tachetés (Arum maculatum) déploient maintenant leurs grandes fleurs vertes.

Nous arrivons maintenant à l’ancier verger, ou subsistent encore de beaux arbres fruitiers. Au milieu de tapis d’ail des ours (Allium ursinum), on remarque les jolies clochettes bleues de la jacinthe des bois (Hyacinthoides non-scripta). On revient vers une zone de forêt plus récente, où l’on voit par exemple Salix caprea (le saule marsault, ici une fleur femelle).

Dans une clairière, c’est cette fois-ci les fleurs mâles de Salix alba (le saule blanc) que l’on aperçoit. Au pied, une toute petite herbacée, Veronica hederifolia (la véronique à feuilles de lierre).

Non loin de là, un tronc d’arbre ne peut que retenir l’attention! Mais qui peut bien faire de pareilles marques? C’est un charançon ravageur, le scolyte, qui pond sous l’écorce et creuse des galeries aux dessins très artistiques!

Nous revenons enfin vers un des étangs du parc, bordé par une ancienne grotte construite au XIXème siècle. Paysage magnifique, perché entre Evere, Schaerbeek et les zones industrielles au bord du canal…

Vous avez apprécié la visite? Malheureusement ce parc magnifique est menacé par un projet qui implique la construction d’un chemin en dur, l’abattage de nombreux arbres, la construction d’aires de jeux, le tout pour un budget pharaonique de 2,3 millions d’euros. Tous les détails sont donnés ici : http://www.cebe.be/website/a_actualites/b_actions/action.php?lng=fr

N’hésitez pas à signer la pétition! NON à ce projet!
http://www.lapetition.be/en-ligne/Sauvez-le-Walckiers-10482.html

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En passant par la Lorraine…

Any English-speaking visitors wanting to revise a bit of French? ;)

 

 

 

 

 

 

This lovely little song is a historical reference to the Franco-German war of 1870,during which a part of my home place (Lorraine) was annexed by Germans. I guess you see where I’m getting at : I want to introduce a very nice reserve located in what we call “Three border region” (Germany, Luxembourg and France). A little map to help you understand :

The 107-hectare reserve of Montenach, which even has a website (http://www.maisondelanature.eu/) is made of various habitats (humid valleys, streams, forest) but is especially famous for its dry calcareous grasslands, home to rare species of plants (23 species of orchids!) and animals. A 3.5 km walk goes through the reserve.

The best time to see orchids is from May 15th and June 15th, so it’s still too early. Here’s the Early purple orchid (Orchis mascula), which, as its English name states, is usually the first to bloom. But orchids aren’t the only treasure found there! On the slopes of grassland, we can see yellow and purple carpets of cowslips and Viola hirta (the  Hairy violet, with its dark and curled spur).

Other very characteristic plants of these grasslands are the the Common Milkwort (Polygala vulgaris), the Cypress Spurge (Euphorbia cyparissias, with yellow-green flowers and narrow, blue-green leaves),  as well as two species of Potentilla (the yellow one is P.neumanniana, the Spring Cinquefoil, while the white one is P.sterilis, the Barren strawberry). P. sterilis looks very much like the wild strawberry (Fragaria vesca), but the petals are overlapping in  the latter.


Later in the spring come the flowers of the Common Columbine (Aquilegia vulgaris, also known as  Granny’s Nightcap…I can understand the resemblance!). On stony patches we can also observe herbs like oregano or Thyme (Thymus sp.). This one actually smells like lemon, so it could be T. pulegioides.

The forested parts of the walk are home to indicator plant species  like Acer campestre (Field Maple), Cornus mas (European cornel, a kind of dogwood) or Mercurialis perennis (Dog’s Mercury), which bears rather inconspicuous green flowers. All those plants are found on calcareous soil. On the forest edge, another lovely species of violet is flowering at the moment, Viola reichenbachiana (the Early Dog-violet).

Violets are accompanied by the wonderful whorls and delicate flowers of woodruff (Galium odoratum). The whole plant contains an aromatic compound called coumarin, and has very diverse uses. In Germany, Luxembourg and Eastern Belgium, the plant is harvested in May and left to macerate in white vine, which gives a delicious drink called Maitrank. ;-)
I even managed to get a pic of a white plant! There are two characters causing such a bizarre look in plants : albinism (the plant does not produce any pigments) or hypochromy (reduced amount of chlorophyll, other pigments – like those found in petals – are produced more or less normally). Albino seedlings usually don’t live very long, but the plant I found has white leaves (except for one, which is half-green) and a greenish stem, so it can probably photosynthezise a little.

A bit further into the forest comes one of my favourite spring plant, Herb Paris (Paris quadrifolia). It is very easy to recognize with its whorl of four leaves. It bears eight pointed stamens, four green and slender petals, and four green sepals (these are called petaloid sepals, because they look exactly like the petals, just a bit larger).

Doesn’t it look sweet? I hope I can go back to the reserve next week, and maybe show you some of the beautiful orchids that grow there!

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A “Clandestine” plant ?

Take a look at this picture…you see a clump of  conifers (precisely Chamaecyparis pisifera, Japanese cypress) with nothing special ? Correct.

Now look down at the ground, under the trees. Hmm, a purple cluster of flowers, and a pungent smell. What on earth is that?

It’s called Lathraea clandestina. Despite its striking colour, it is usually well hidden under trees, hence the attribute “clandestine“. It’s native from Belgium, France, Northern Spain & Italy but has been introduced in the UK as a garden plant.
What’s so special about this plant? It’s one of the true parasites : Lathraea has to suck nutrients from its hosts (usually willow or alder, but not always!) because it lacks chlorophyll and can’t photosynthesize. Its underground stem bears yellow scale-like leaves resembling little teeth, hence the common name Toothwort.
Don’t you find it really pretty? ;)

I’ve spotted this one in le Jardin Massart (my ex-university garden), a very nice park unknown to many (maybe because it’s closed on week-ends :( ) but home to several rare plant and animal species. It encompasses a natural wetland, an arboretum, an orchard, and several themed gardens (honey plants, plant systematics, medicinal plants..). Ready for a little visit?

I was surprised to see Fritillaria meleagris (Snake’s Head Fritillary) delicate flowers (it’s considered extinct in Belgium, so these are most likely introduced) and Chrysosplenium oppositifolium (Opposite-leaved Golden Saxifrage) with its peculiar yellow-green flower heads.

Another sweet encounter : Leucojum aestivum (Summer Snowflake), taller than the  Spring Snowflake (Leucojum vernum). Not an usual sighting in Brussels : Corydalis solida (a kind of Fumewort), with its characteristic tube-shaped flowers.

In the marshy zone, it’s the perfect time to see Caltha palustris (Kingcup)  flowers (notice how close it looks to the Lesser Celandine, also flowering at the moment…it belongs to the same family, Ranunculaceae). I was also surprised to discover wild Hippuris vulgaris (Common Mare’s Tail). I have a few planted in my garden pond, but this native plant is considered critically endangered in Wallonia.

Damp soils are also favoured by the Cuckoo Flower (Cardamine pratensis), which is edible, and the Great Horsetail (Equisetum telmateia), a primitive plant reproducing by spores instead of seeds. What you see here is a strobilus, a bizarre non-photosynthetic cone-like structure bearing the spores.

With some many flowers blooming, insects have a lot of pollination work to do! Check out this bee fly (Bombyliidae), a hairy fly resembling…a bee. Bombyliidae bear a long proboscis, which helps them to feed on the nectar of tubular flowers.
I also met metallic blue beetles which were mating everywhere (Chrysomelidae, leaf beetles). Quite a showy colour, probably a case of aposematism (insects “warn” their predators that they are toxic by displaying bright colours).

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