Entomology curator @NMIreland & Invertebrate ecologist interested in all aspects of Irish biodiversity. 🐌🐞🦟🐚🦋 Personal account.
Dublin, Ireland
Joined November 2016
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Aidan O'Hanlon retweeted
Micheál Martin has finally met his toughest opponent on the triple lock: Micheál Martin.
Well, he did invite us to go back over his record
Aidan O'Hanlon retweeted
Ever wondered what sampling methods are best to catch saproxylic (and other wood-inhabiting) beetles? Check out this paper just published. Senior author was the wonderful Aoife Crowe. The paper is behind a paywall. If you would like a copy DM me.
doi.org/10.1007/s10841-026-0…
Aidan O'Hanlon retweeted
Shifting Baseline Syndrom. Eins der großen Probleme in der Wahrnehmung des Artensterbens. Kurz gesagt: Das was wir als Heranwachsender kennen, wird als der Normalzustand empfunden. Damit verschiebt sich aber die Baseline von Generation zu Generation, und viel Information geht verloren… der tatsächliche Verlust an Vielfalt ist viel dramatischer als wir ihn wahrnehmen.
Aidan O'Hanlon retweeted
This insect is a female Giant Ichneumon Wasp, specifically the species Megarhyssa atrata (also known as the Black Giant Ichneumon Wasp).
Roger Casement: humanitarian, nationalist martyr and amateur zoologist. Read a summary of my upcoming publication here:
rte.ie/brainstorm/2026/0424/…
Vipers, butterflies & parrots: the secret life of Roger Casement. Best known for his role in Ireland's fight for freedom, Casement's fascinating zoological legacy can be found in many Irish museums. By @MusingMollusc @NMIreland & Angus Mitchell RIA rte.ie/brainstorm/2026/0424/…
Aidan O'Hanlon retweeted
Vipers, butterflies & parrots: the secret life of Roger Casement. Best known for his role in Ireland's fight for freedom, Casement's fascinating zoological legacy can be found in many Irish museums. By @MusingMollusc @NMIreland & Angus Mitchell RIA rte.ie/brainstorm/2026/0424/…
Aidan O'Hanlon retweeted
For the third year in a row, a cuckoo has landed in Killarney National Park after flying over 9,000 kilometres from Ghana.
Cuach Cores had not been heard of since last Autumn after he’d successfully crossed the Sahara.
jrnl.ie/7019857
Aidan O'Hanlon retweeted
Arthropod Photo of the Week: April 15, 2026
Millipede
Oxidus gracilis
Polydesmida: Paradoxosomatidae
Observed in Fort Mountain State Park, Georgia USA
By Steve Long (buff.ly/E7Fg4wO), Florida, USA
#arthropodPOTW
ALT Two brown millipedes are positioned on the rough surface of a tree trunk, one on the other’s back and bodies closely aligned. Green blurred background.
Aidan O'Hanlon retweeted
This is the Eight Circled Cross page from the Book of Kells. The level of detail is absolutely insane; I made a replica of this a couple of years ago, and even scaling it up to twice the size, there were still sections I had to simplify because the detail was just too fine.
Aidan O'Hanlon retweeted
Snipe news!
1/4
Two Snipe tagged in Iceland by José Alves left Ireland at dusk on 5 April and reached Iceland 17 hours later. See map.
Averaging 80 and 87 km/h
#ornithology
Aidan O'Hanlon retweeted
Arthropod Photo of the Week: April 1, 2026
Sweat bee
Halictus ligatus
Hymenoptera: Halictidae
Observed in North Carolina, USA
By Rey Acevedo (buff.ly/SAMX5Lp), North Carolina, USA
#arthropodPOTW
ALT A close-up of a bee perched on a cluster of vibrant blue flowers with green buds, against a blurred green background.