Tessera

Lars Willighagen

@larswillighagen.bsky.social

PhD candidate in Ecology at Radboud University, software developer for CDLI, Open Source programmer (Citation.js). Mainly active on Mastodon: https://mastodon.social/@larsgw

66 Posts37 Follower 42 Folgt

Chris van Swaay @chrisvanswaay.eurosky.social · 2w ago

The Essex Skipper (zwartsprietdikkopje, T lineola) had declined by >90% on Dutch Butterfly Monitoring transects since 1995. In N America the species is an invasive, accidentilly introduced around 1910, still expanding. This photo from www.inaturalist.org/observations/231653174 shows it in NW Canada.

Lars Willighagen @larswillighagen.bsky.social · last mo.

Using GBIF RDF to find applicable taxonomic literature larsgw.blogspot.com/2026/08/usin...

Using GBIF RDF to find applicable taxonomic literature

Recently, after the wonderful work of Andra Waagmeester , Jerven Bolleman , and Hannah Bast , an RDF version of the data on the Global Biod...

larsgw.blogspot.com

Lars Willighagen @larswillighagen.bsky.social · 2mo ago

Lots of spotted antlions on a fence next to a parking lot in Nijmegen. #antlion

Closeup three-quarters of antlion, showing the irregular, thick antennae; an eye like a black pearl; and a pattern of grey and beige lines on its head and thorax.

Closeup of the wings of the antlion, showing regular, rectangular venation with part of the veins in white and part in black.

Lars Willighagen @larswillighagen.bsky.social · 3mo ago

Some nice bugs on Phedimus hybridus at the Radboud University campus yesterday: Ortholomus punctipennis (but with black antennae and very contrasty wings), Dolycoris baccarum nymph, O. punctipennis nymph (presumably), and Scolopostethus decoratus

Greyish brown bug with black antennae and dark wings with sharply delineated white veins

Grey bug nymph with small tubercules and a longitudinal white line

Colorful ground bug with a pattern of white, black, and a reddish brown

Egon Willigh☮gen 🟥@egonw.mastodon.social.ap.brid.gy · 4mo ago

since a week or two I get this Apache Jena 6.x error: org.apache.jena.dboe.trans.bplustree.BPTreeException: Node block manager empty = true // Records block manager empty = false Anyone recognizes this? #java #apache #help

Amyville Hoyrror @amyhoy.bsky.social · 4mo ago

the psychology of computer programming gerald weinberg 1971

Thomas Spooks 🎃👻💀@thomasfuchs.at · 4mo ago

Nothing ever changes

Some years ago, when COBOL was the great white programming hope, one heard much talk of the possibility of executives being able to read programs.

With the perspective of time, we can see that this claim was merely intended to attract the funds of executives who hoped to free themselves from bondage to their programmers.

Nobody can seriously have believed that executives could read programs. Why should they? Even programmers do not read pro-grams.

Lars Willighagen @larswillighagen.bsky.social · 4mo ago

Our Library of Identification Resources was featured in De Levende Natuur, a Dutch nature magazine (published since 1896) in the rubric "New keys"! delevendenatuurmagazine.nl/de-levende-n... (subscription required)

Zoekmachine en database voor online sleutels | De Levende Natuur – Nummer 03 2026

De Levende Natuur informeert over onderzoek, beheer en beleving van de natuur in Nederland en België. De artikelen zijn vooral gebaseerd op eigen onderzoek, observatie en ervaring van de auteurs.

delevendenatuurmagazine.nl

Terry & Judy Wood @tandjwood.bsky.social · 5mo ago

A week or so ago we had the amazing privilege of watching a Mottled Shieldbug (Rhaphigaster nebulosa) laying eggs on, of all things, the landing window providing a most unusual view! The eggs are developing nicely and hopefully we will be able to see the 1st instars soon. @rockwolf74.bsky.social

David Buchanan @retr0.id · 6mo ago

have you seen the new supply chain vuln? don't update tubu. it's literally on heebee. they got poodee's deps. they infiltrated dippy. roll back weeno. disable scripts in ~/.gumpyrc. it's in poob. do not install poob. do not update poob. uninstall poob right now. poob has it in for you.

Jean-Lou Justine @jean-lou-justine.bsky.social · 8mo ago

Our new paper is now published! 🧪 "Cats, dogs, and sticky worms: invasion by land flatworms (Geoplanidae) is facilitated by household pets" doi.org/10.7717/peer...

Figure 2: Example of photographs, received via citizen science, showing Caenoplana variegata collected from domestic pets.
(A) Collected from a dog, (B–D) collected from cats. Cat hair still attached to the flatworm is visible in B and C. A, Case #07 in Table 1; B, Case #11; C, Case #12; D, Case #13. A, photograph by Catherine Vaillant; B, C, photographs by anonymous contributors; C, photograph by Floriane Delaval. Anonymous contributors signed a copyright consent for their photographs, but did not wish to have their name included in a publication.

Department of Ecology - Radboud University @ecology-radboud.bsky.social · 8mo ago

🧵 Today is World Wetlands Day, celebrating the importance of wetlands and their impact on people and the planet! 🌍 Two weeks ago, RTV Drenthe interviewed one of our PhD candidates, Quint van Giersbergen, in a drained peatland in Gasteren, Drenthe.

Radboud Institute for Biological and Environmental Sciences @ribesresearch.bsky.social · 9mo ago

Our new research project MicroSafe focuses on the impact of climate change on microbial growth (such as Legionella) in wet cooling towers. Due to climate change and higher temperatures, the risk of pathogen spread may increase. Read more: www.ru.nl/en/research/... #microbiology #legionella 🧪🦠

NWO funding for research project on the effects of climate change on microbial growth in cooling towers | Radboud University

An international research team has received an NWO grant of €700,000 for the research project MicroSafe, which focuses on the impact of climate change on microbial growth in wet cooling towers.

ru.nl

Nederlandse Entomologische Vereniging @nev.nl · 10mo ago

De ReeHorst is klaar voor de NEV Entomologendag! Laat de onderzoekers en enthousiastelingen maar komen! 🦋

Biodiversity Data Journal @bdj.pensoft.net · 11mo ago

A dataset of 45,486 records of 90,070 specimens from 134 species of ground beetles caught between 1959 and 1966 in the Province of Drenthe, the Netherlands: doi.org/10.3897/BDJ.... #arthropods #biodiversity #insects

Miguel Bastos Araújo, PhD @miguelbaraujo.bsky.social · 11mo ago

The 2025 edition of the SDM course marked the 10th anniversary of this event. It was a real pleasure to engage once again with high-level students, postdocs and senior professionals during this immersive seven-day exploration of the geography of species distributions and interactions.

Lars Willighagen @larswillighagen.bsky.social · last yr.

One of my first open sources projects, Citation.js (citation.js.org), turns 10 years old today! larsgw.blogspot.com/2025/09/10-y...

10 years of Citation.js

10 years ago, on September 28th, 2015, I pushed the first commit of “C [1] ”, which would later form the basis of Citation.js . Back then, ...

larsgw.blogspot.com

Biodiversity Data Journal @bdj.pensoft.net · last yr.

A FAIR overview of identification resources, complete with an interface and a search engine: doi.org/10.3897/BDJ.... #FAIRdata #taxonomy #biodiversity @larswillighagen.bsky.social

Department of Ecology - Radboud University @ecology-radboud.bsky.social · last yr.

There have been some busy bees 🍯in the department! Judith van der Knaap and colleagues published a paper in Ecosystems about the contribution of drainage ditches to greenhouse gas emissions in drained peatlands here in the Netherlands. Read here: link.springer.com/article/10.1...

Disproportionately High Contribution of Ditches to Landscape Greenhouse Gas Emissions in Drained Peatlands - Ecosystems

Drained peatlands are a significant source of greenhouse gas (GHG) emissions; however, research has predominantly focused on terrestrial areas, with much less attention given to drainage ditches. Desp...

link.springer.com

Lars Willighagen @larswillighagen.bsky.social · last yr.

Our paper on the Library of Identification Resources is out! In it, we describe how and why to record publications for the taxonomic identification of organisms in a FAIR database, and how to query that data to find applicable resources for an insect or a plant in NW Europe. doi.org/10.3897/BDJ....

Library of Identification Resources: a FAIR overview of taxonomic keys

Biodiversity is declining globally, and ecological research is key to monitor and counteract this decline. Such research requires the taxonomic identification of organisms by both professional and cit...

doi.org

Radboud Institute for Biological and Environmental Sciences @ribesresearch.bsky.social · last yr.

A large census conducted on 157 dikes along rivers in the Netherlands revealed that more and rarer bee species live on dikes than previously thought. According to ecologist Constant Swinkels, many more dikes can be made bee-friendly. #bees #science #ecology #dikes www.ru.nl/en/research/...

Flower-filled dikes attract bees: ‘Dikes are insect highways’ | Radboud University

A large census conducted on 157 dikes along rivers in the Netherlands revealed that more and rarer bee species live on dikes than previously thought.

ru.nl

Department of Ecology - Radboud University @ecology-radboud.bsky.social · last yr.

Paper alert! PhD student Yvet Telgenkamp and colleagues measured Sphagnum carpet subsidence in a long-term vascular plant removal experiment at Store Mosse National Park in Sweden. They found that vascular plants provide scaffolding for Sphagnum moss. www.sciencedirect.com/science/arti...

Standing tall together: Peatland vascular plants facilitate Sphagnum moss microtopography

To preserve the heterogenic and diverse nature of peatland ecosystems, a well-functioning plant community is imperative. In intact peat bogs, such com…

sciencedirect.com

southpaw @nycsouthpaw.bsky.social · last yr.

A useful deep dive on the forecasts here. theeyewall.substack.com/p/making-sen...

Did budget cuts play a role?
No. In this particular case, we have seen absolutely nothing to suggest that current staffing or budget issues within NOAA and the NWS played any role at all in this event. Anyone using this event to claim that is being dishonest. There are many places you can go with expressing thoughts on the current and proposed cuts. We've been very vocal about them here. But this is not the right event for those takes.
In fact, weather balloon launches played a vital role in forecast messaging on Thursday night as the event was beginning to unfold. If you want to go that route, use this event as a symbol of the value NOAA and NWS bring to society, understanding that as horrific as this is, yes, it could always have been even worse.

Trevor A. Branch @trevorabranch.bsky.social · last yr.

In an unconscionable decision, the Smithsonian Institute has decided to no longer support the Biodiversity Heritage Library from 1 Jan 2026. Please someone step up and take it over.

Trevor A. Branch@trevorabranch.bsky.social · last yr.

Foundations: please step up and take over the Biodiversity Heritage Library (BHL). This is an absolutely essential scanned archive of all of the old journals and books from the 1500s to about 1920. Has been indispensable for my research. about.biodiversitylibrary.org/call-for-sup...

Nigel Jones @lancefly.bsky.social · last yr.

Absolutely superb! I have a roost of Lasioglossum cf calceatum males in my garden. Maximum count so far 18. It's warm so thet are skittish and photographing them is hard. They have been building in numbers since about 16:30 hrs. This is just the best! Will give regular updates as it happens.

5 male Lasioglossum male mining bees roosting on buttercup seed heads.

7 male Lassioglossum males roosting on stems of and seedheads on buttercup plants.

A patch of unmown lawn in a garden in Shrewsbury, UK. A roost of up to 18 males has built up here today - 29 June 2025.

Lars Willighagen @larswillighagen.bsky.social · last yr.

Found a species of shield bug I hadn't seen before, Neottiglossa pusilla! Related to Aelia and also found on grasses.

Closeup of a small brown bug with lighter dots and a central line, and a wide, flat face. On a white net.

Émilie Pagé-Perron @epp.cdli.network · last yr.

In Amsterdam for #dhbenelux2025 and got the privilege.to catch up in person with #cdli lead dev @larswillighagen.bsky.social 😁

Sean Morrow @snmrrw.bsky.social · last yr.

Wow: after 15 years, YouTube has taken down the original 'Rick Roll' video due to a "licensing issue," likely due to the acquisition of Astley's record lable. The metadata remains, but if you click through it goes to 'video not found': www.youtube.com/watch?v=dQw4...

Rick Astley - Never Gonna Give You Up (Official Music Video)

YouTube video by Rick Astley

youtube.com

Siobhan Leachman @siobhanleachman.bsky.social · last yr.

A press release is out about the Biodiversity Heritage Library. From 1 January 2026 the Smithsonian will no longer host the administrative functions of BHL. BHL is looking for a new home. For further information see blog.biodiversitylibrary.org/2025/04/new-... #ILoveBHL #BiodiversityHeritageLibrary

A New Future for the Biodiversity Heritage Library

The Biodiversity Heritage Library (BHL) is the world’s largest open access digital library for biodiversity literature and archives. A global consortium of over 660 contributors, BHL has made more …

blog.biodiversitylibrary.org

jamelle @jamellebouie.net · last yr.

really brutal chotinering right here www.newyorker.com/news/q-and-a...

The Biden Official Who Doesn’t Oppose Trump’s Student Deportations

Why the Holocaust historian Deborah Lipstadt blames universities for “opening the door” to the Trump Administration’s professed campaign to tackle antisemitism.

newyorker.com