Tessera

Darius Stiels

@dstiels.bsky.social

Ornithology | Biogeography | Conservation | Ecology PhD student (@leibnizlib); Freelancer Biologist; NWO office (@nworni); OAG Bonn; views are personal

202 Posts283 Follower 363 Folgt

Darius Stiels @dstiels.bsky.social · 3d ago

Ruddy darter in a city park Blutrote Heidelibelle | Sympetrum sanguineum 2026-07-25, #Siebengebirge, 🇩🇪 #Odonata #dragonfly #dragonflies #nature #naturephotography #photography #summer #light #insects #flyday #wilidlifephotography #UrbanNature #ECK #Libelle #Tierfoto #Naturfoto #Stadtnatur #Natur

Side view of a freshly emerged ruddy darter (Sympetrum sanguineum) on a plant. The background is greenish

Darius Stiels @dstiels.bsky.social · 5d ago

#Gatekeeper in early morning light. Rotbraunes Ochsenauge (Pyronia tithonus) 2026-07-12, #Rheinland, 🇩🇪 #Lepidoptera #butterfly #butterflies #nature #naturephotography #photography #orange #summer #light #insects #flyday #Pyronia #Naturfoto #Tierfoto #weekendfeeling #colours #wilidlifephotography

Pyronia tithonus on a plant in early morning light against a greenish background. The forewings seem translucent orange due to the light conditions.

Darius Stiels @dstiels.bsky.social · 4w ago

Common yellow swallowtail 🦋 2026-07-09 #Siebengebirge 🇩🇪 2nd #observation in the #garden 🤩 #Schwalbenschwanz #Lepidoptera #butterfly #butterflies #nature #naturephotography #photography #violett #summer #yellow #insects #flyday #Papilio #Naturfoto #Tierfoto #patchgold #weekendfeeling #colours

Papilio machaon on an inflorescence of Buddleja sp. Another inflorescence to the left and hardly visible a bumble-bee below the butterfly. Some leaves can be seen in the right lower corner. The background is blackish. Theswallowtail shows its yellow upperside which is illuminated by the late afternoon sun.

Darius Stiels @dstiels.bsky.social · last mo.

Silver-washed fritillary | Argynnis paphia | Kaisermantel 🦋🧡 2026-07-02 #Siebengebirge, 🇩🇪 #Lepidoptera #butterfly #butterflies #nature #garden #naturephotography #photography #orange #summer #colours #Buddleja #violett #insects #insectphotography #wildlife

Silver-washed fritillary Argynnis paphia on Buddleja inflorescence

Darius Stiels @dstiels.bsky.social · last mo.

#Orange 🦋 for your timeline 🧡 Marbled Fritillary (Brombeer-Perlmuttfalter) has expanded its range dramatically but I still enjoy any sighting. 2026-06-28, #Siebengebirge #Lepidoptera #photography #naturephotography #nature #butterfly #insectphotography #butterflies #garden #biodiversity #flyday

Two Marbled Fritillary (Brenthis daphne | Brombeer-Perlmuttfalter) on bramble flowers. The butterfly on the right shows its upperside, the one on the left has its wing open towards the observer. It is a bit blurred. The background is greenich (leaves) and a mixture of light and shadow.

Germán Orizaola @gorizaola.bsky.social · last mo.

Today marks one of the most important days in the history of Science. OTD in 1858, Charles Darwin and Alfred R. Wallace revealed the idea of evolution by natural selection @linneansociety.bsky.social meeting (although any of them was actually present) darwin-online.org.uk/content/fram...

Darius Stiels @dstiels.bsky.social · last mo.

Marbled white: #butterfly species no 33 on the garden list 🥳 Schachbrett: #Tagfalter Nr. 33 auf der Gartenliste 🥳 28.06.2026, #Siebengebirge, 🇩🇪 #Lepidoptera #photography #naturephotography #nature #buterfly #insectphotography #butterflies #garden #biodiversity

A rather distant shot of Melanargia galathea on a inflorescence of a Buddleja bush. The butterfly shows its distinctive underwing pattern.

Darius Stiels @dstiels.bsky.social · last mo.

Want to let you know that Eurasian white admiral (Kleiner Eisvogel) has a spectacular underwing pattern! 🤩 2026-06-26, #Siebengebirge, 🇩🇪 #Lepidoptera #photography #naturephotography #nature #buterfly #insectphotography #butterflies #garden #biodiversity #buddleja

Limenitis camilla on a Buddleja inflorescence. The butterfly shows its left underwing and parts of the the right upperwing.

Darius Stiels @dstiels.bsky.social · 2mo ago

#ShiftingBaselineSyndrome

Leibniz-Zentrum für Agrarlandschaftsforschung (ZALF)@zalf.bsky.social · 2mo ago

🐦 🌼 Many young adults are familiar with dandelions or sparrows - but typical species of the agricultural landscape, such as cornflowers or skylarks, are gradually being forgotten. A ZALF study shows that knowledge of diversity is declining, especially among younger people. www.zalf.de/en/aktue...

Cornflowers on a field.

Image: Maria Kernecker / ZALF.

Darius Stiels @dstiels.bsky.social · 2mo ago

TFW you and your terrace are a great mineral source for a Lesser Purple Emperor (Apatura ilia | Kleiner Schillerfalter). 2026-06-16, #Siebengebirge, 🇩🇪 #Lepidoptera #Butterfly #Insects #Photography #Naturephotography #Insectphotography #Butterflies #iridescence #blue #colour

Darius Stiels @dstiels.bsky.social · 2mo ago

Today’s #BirdOfTheDay theme is #NegativeSpace. The alt is #Solitude. Here is a distant Peregrine Falcon on rocky peak against the clear #bluesky in the #Siebengebirge 🇩🇪 #BirdsSeenIn2026 #Birds #birdphotography #naturephotography #Wanderfalke #birding #photography #patchbirding #peregrinefalcon

A rugged tip of a small mountain. A Peregrine Falcon (Falco peregrinus) ist sitting on one of the rocky peaks to the left. There is also a small leafless tree. The sky in the background is blue.

Darius Stiels @dstiels.bsky.social · 2mo ago

Cordulegaster bidentata | Sombre Goldenring | Gestreifte Quelljungfer What a gigantic stunner among the Central European #dragonflies! Found during a BBQ in the #garden of my in-laws 🫣 2026-05-25, #Siebengebirge, 🇩🇪 #Odonata #Photography #NaturePhotography #OMSystems #WildlifePhotography #Insects

Cordulegaster bidentata hanging from a twig. Some leaves. The background is greenish.

Darius Stiels @dstiels.bsky.social · 3mo ago

#BirdOfTheDay themes are #ScrollBack ✅ and #unloved ✅ so here's a recent shot of a Common wood pigeon. The georgeousness of this abundant species might be a bit underrated. 2026-05-16, #Siebengebirge, 🇩🇪 #BirdsSeenIn2026 #birds #birdphotography #naturephotography #photography #portrait #birding

A portrait of a Common Wood-Pigeon (Columba palumbus). The bird is looking to the left. The background ist greenish. The picture shows the head and parts of the body,

Darius Stiels @dstiels.bsky.social · 3mo ago

“Today's #BirdOfTheDay theme is #LinedUp, 3 or more birds in a line. The Alt Theme is #Laridae, any of the named species" Black-headed Gulls on a railing next to the river #Rhine in #Bonn /🇩🇪 fulfill all four requisites. 😉 #birds #birding #birdphotography #naturephotography #urbanbirding #gulls

Black-headed Gull (Chroicocephalus ridibundus) on a metal railing. Grey water in the background.

Darius Stiels @dstiels.bsky.social · 3mo ago

A singing Savi's Warbler in early morning backlight was my weekend's highlight. A very rare bird in my area. 🔊 to listen to one of the strangest songbird sounds in Europe. 2026-05-09, Rhineland-Palatinate, 🇩🇪 #birding #birdwatching #birdvideo #warbler #birds #birdsong #BirdsSeenIn2026

Darius Stiels @dstiels.bsky.social · 6mo ago

#Sporophila #Seedeater #Pfäffchen

Aves do Brasil@avesbrasil.bsky.social · 6mo ago

🇧🇷Caboclinho-de-barriga-vermelha 🌎Sporophila hypoxantha Conservação: Pouco Preocupante O caboclinho-de-barriga-vermelha é uma ave passeriforme da família Thraupidae. Também conhecido por caboclinho-rosa. 📷 Dario Sanches

Um pássaro pequeno, com plumagem predominante em tons de laranja e cinza-azulado, pousa sobre um galho fino. A cabeça é cinza, com uma máscara facial alaranjada que se estende até o peito. As costas e asas são de um cinza-azulado escuro, enquanto o ventre e flancos exibem um laranja vibrante. A cauda é alongada e de cor cinza. As patas escuras agarram-se firmemente ao galho seco. O fundo é um mosaico de verde suave, sugerindo folhagem distante.
Atenção: O alt da imagem foi gerado automaticamente.

Darius Stiels @dstiels.bsky.social · 6mo ago

Today's #BirdOfTheDay is #posted. This European Turtle Dove is one of only a few left in the Rhineland so I appreciate any observation. #birds #birdphotography #nature #conservation #photography

A European Turtle Dove (Streptopelia turtur) sitting on a fence post.

American Birding Association @aba.org · 6mo ago

If you can, be nice to yourself and go birding this weekend.

Darius Stiels @dstiels.bsky.social · 6mo ago

When your working day is suddenly interrupted because you have to watch a Red #Squirrel collecting nesting material in front of the window... 📍 #Siebengebirge #nature #wildlife #naturephotography #photography #spring #wildlifephotography #mammals #photoftheday #squirrels

A Red Squirrel (Sciurus vulgaris) with gras (nesting material) in its mouth. The mammal is standig upright on the ground looking to the right (from the viewers point). The grassy ground is covered with some leaves.

Darius Stiels @dstiels.bsky.social · 6mo ago

A Common wood pigeon in the #garden makes #eyecontact for #BirdOfTheDay. #gardenbirds #birds #birding #birdphotography #birdsofbluesky #nature #gardenbirding #naturephotography #photography

Darius Stiels @dstiels.bsky.social · 6mo ago

Liebe @taz.de, ein YT-Video einer gut dressierten Taube als Quelle. 🤔 Sprecht doch mal mit Forschenden oder schiebt den Artikel in "Die Wahrheit". #Journalismus braucht deutlich mehr #Biologie -Kompetenz... ps Mein Hund kann sprechen (Loriot) #Zeitungsente #FakeNews taz.de/Russisches-U...

Russisches Unternehmen präsentiert fernsteuerbare Tauben

Ein russisches Unternehmen präsentiert Tauben mit Gehirnimplantaten – fernsteuerbar wie Drohnen. Macht das Moskaus Spionage noch gefährlicher?

taz.de

Darius Stiels @dstiels.bsky.social · 6mo ago

A Blue Tit kindly reminds you of your good resolutions towards a few minutes of #birding every day. 🪶🐦 2026-01-24, #Siebengebirge (🇩🇪) #BirdsSeenIn2026 #gardenbirding #patchbirding #birds #birdphotography #BirdOfTheDay #naturephotography #wildlifephotography #urbanbirding #photography #nature

A Blue Tit on a twig turn its head to the left (from the bird's point of view). A few blurry green spots in the foreground are leaves.

Darius Stiels @dstiels.bsky.social · 6mo ago

Light conditions in the shady #garden were far from perfect. This Great Tit on a branch managed to sneak into your timeline to brighten up your weekend, anyway. 2026-01-24 #Siebengebirge 🇩🇪 #BirdsSeenIn2026 #birds #birding #gardenbirding #patchbirding #birdphotography #naturephotography #photography

Great Tit | Parus major | Kohlmeise on a branch. The background is illuminated by the sun in beige, brown and greenish.

RiffReporter @riffreporter.bsky.social · 7mo ago

Der #Bienenfresser erobert Deutschland. Dabei ist der bunte Vogel eigentlich in wärmeren Regionen zu Hause. Im Interview mit @thomaskrumenacker.bsky.social erklärt der Biologe Hans-Valentin Bastian, warum man den Bienenfresser hierzulande immer häufiger sieht. @dornitholges.bsky.social

Bienenfresser boomen in Deutschland: Das tropische Gesicht des Klimawandels

Die Zahl der Bienenfresser in Deutschland steigt weiter an. 2025 wurden etwa 6800 Brutpaare gezählt - ein deutliches Zeichen des Klimawandels, sagt ein Experte

riffreporter.de

Darius Stiels @dstiels.bsky.social · 7mo ago

A Great White Egret for #BirdOfTheDay #LongBeaks #BirdsInFlight

Great White Egret in flight from left to right. Water surface in the background.

Darius Stiels @dstiels.bsky.social · 7mo ago

Boardwalk on the island of #Ilhabela (Brasil) 🌿 #photography

Janet Hill@saskajanet.bsky.social · 7mo ago

Get in, we’re posting boardwalks 🌿

Darius Stiels @dstiels.bsky.social · 7mo ago

Given that there are no conspecifics in the region, the lonely Whooper Swan near Bonn might also be a late addition to the #solitude theme of #BirdoftheDay.🫣🦢

Darius Stiels@dstiels.bsky.social · 7mo ago

🦢 Whooper Swan (Cygnus cygnus), an exceedingly rare guest here and a highly welcome late afternoon twitch. 🥳 A digiscoped shot in pouring rain for #BirdsSeenIn2026 2026-01-12, #Rhineland, 🇩🇪 #birding #birds #birdphotography #nature #naturephotography

Whooper Swan on a green field (possibly Brassica). A digiscoped record shot. The bird is seen from behind and looks to the left.

Darius Stiels @dstiels.bsky.social · 7mo ago

Nordrhein-Westfälische Ornithologengesellschaft e.V.@nworni.bsky.social · 7mo ago

#Wetterlage 🥶❄️🌨️☃️🌬️: Wie gehen #Vögel mit #Schnee und #Eis um? Warum frieren die Füße auf dem Eis nicht ein? Welcher Vogel hat einen Vorrats-Kühlschrank? Warum haben #Eisvögel im #Winter Probleme? #Winterschlaf? #Winterflucht? ... Unsere #FAQ haben die Antworten ➡ nw-ornithologen.de/index.php/da...