#InsectAdvent
Day 12!!! Of #InsectAdvent
Day 11 of #InsectAdvent - its Saturday night so XMAS PARTY (maybe romance..)

Lets put on some perfume. This female Megaselia (Phoridae) releases from her dorsal abdominal glands, a fragrance so strong the males just have to immerse themselves in it

@royentsoc.bsky.social @dipterists.bsky.social
December 13, 2025 at 12:03 PM
Day 10 of #InsectAdvent & the Christmas flirting has ramped up

This male Robberfly, Pegesimallus teratodes, has striking, feather-like scales on its hind legs, likely used for female attraction during courtship. (& cleaning the dance floor)

@royentsoc.bsky.social @dipterists.bsky.social
December 11, 2025 at 9:59 AM
Day 20 of #InsectAdvent

Nearly there, eyes on the prize of Christmas Day. Talking of eyes, some of the best eyed creatures are stalk-eyed flies including Plagoiocephalus latifrons (image @bertonemyia.bsky.social) we saw in Costa Rica

@royentsoc.bsky.social @dipterists.bsky.social
December 21, 2025 at 6:09 PM
Day 24 of #InsectAdvent and the flying reindeer have arrived!

Oh no they haven’t…

It’s a Ricardia sp (Richardiidae) that I collected from Honduran Cloud Forest, one of the many species of antlered flies.

@royentsoc.bsky.social @dipterists.bsky.social
December 24, 2025 at 11:34 AM
Its day 2 of #InsectAdvent

I think that this little fly ate too many mince pies! Welcome to Platyna hastata - whose bum maybe as wide as they are long!

Soldierflies or Stratiomyidae are some of the most eye-catching of the flies.

@royentsoc.bsky.social @dipterists.bsky.social
December 2, 2025 at 1:32 PM
For #InsectAdvent, I present a head as hairy as that of Santa Claus himself.

This gorgeous beardy-wierdy belongs to the beefly NHMUK016433577_Trichophthalma_porteri_PT (& soon to be available on the @nhm-london.bsky.social data portal)

#digitisation #diptera
December 1, 2025 at 4:38 PM
Day 6 of #InsectAdvent

Done all your prep for you Xmas party? Decorations up, food organised and your outfit looking amazing. Then relax like this Bombylius discolor - sitting down in its finest waiting for the action to start…

@royentsoc.bsky.social @dipterists.bsky.social
December 6, 2025 at 4:14 PM
Day 5 of #InsectAdvent

The imbiber. The one that’s always finishing every last drop of wine

Rhingia campestris - the Heineken fly so called as it refreshes the parts other insects cannot reach..cheers

@royentsoc.bsky.social @dipterists.bsky.social
December 5, 2025 at 7:28 PM
Day 14 #InsectAdvent & Christmas cards are being sent/ received

Can you imagine having to write a card to this soldierfly - Parastratiosphecomyia stratiosphecomyioides. It has the longest name in the Animal Kingdom. Luckily the address is short..

@royentsoc.bsky.social @dipterists.bsky.social
December 15, 2025 at 1:41 PM
Day 13 #InsectAdvent & have you decorated the tree yet?

What about this tree? This in fact the hairy whorls of a male Chaoborid or Phantom midge’s antennae. Packed full of sensors, this ‘tree’ is more than a mere decoration

@royentsoc.bsky.social @dipterists.bsky.social
December 14, 2025 at 5:26 PM
Day 10 of #InsectAdvent & we are wrapping the presents

What about this bling covering - The genus Formosia (Tachinidae) have some of the most striking bodies. Its not for showing off but to hide in the mottled forest light (hiding as we do under a tree) their 'presence'

@royentsoc.bsky.social
December 10, 2025 at 12:57 PM
Day 16 #InsectAdvent

The Nativity story is set in a stables in Bethlehem where the People were surrounded by animals, not all of them welcome. The stable fly Stomoxys calcitrans (Muscidae) gives the gift of a painful 'bite' to all attending mammals

@dipterists.bsky.social @royentsoc.bsky.social
December 17, 2025 at 3:15 PM
Day 3 of #InsectAdvent

For our Nativity themed posts what about a specimen from Natal (Portuguese for Christmas) that comes equipped with the best drinking straw!

Prosoeca ganglbaueri (Nemestrinidae) could even steal your drink from across the room

@royentsoc.bsky.social @dipterists.bsky.social
December 3, 2025 at 4:51 PM
Day 11 of #InsectAdvent - its Saturday night so XMAS PARTY (maybe romance..)

Lets put on some perfume. This female Megaselia (Phoridae) releases from her dorsal abdominal glands, a fragrance so strong the males just have to immerse themselves in it

@royentsoc.bsky.social @dipterists.bsky.social
December 13, 2025 at 11:42 AM
Day 21 of #InsectAdvent

Christmas is a time of over-eating. But we're not the biggest feasters. Hermetia illucens (Black-Soldier fly) larvae are capable of eating up to 2x its own body mass in food per day - the best bio recyclers consuming our waste

@royentsoc.bsky.social @dipterists.bsky.social
December 22, 2025 at 11:07 AM
Day 15 #InsectAdvent

And even the flies are getting festive. Sporting massive antlers akin to Moose or Reindeer, Phytalmia sp (Tephritidae) males, will use them to fight for their right.......to PARTY (with the opposite sex...)

@royentsoc.bsky.social @dipterists.bsky.social
December 16, 2025 at 4:18 PM
Day 11 of #InsectAdvent & one of my favs

Cephenemyia trompe aka The reindeer nose botfly

If you are a reindeer & this is your view be prepared to have eggs squirted into your nostrils! Mothers track hosts over long distances before firing her eggs

@royentsoc.bsky.social @dipterists.bsky.social
December 12, 2025 at 11:35 AM
Day 23 of #InsectAdvent

As the angels spread their wings, so do the flies. Rhamphomyia marginata (Empididae) are found across Europe & unusually for animals, it is the females that form the flirty swarms. Maybe not such angelic behaviour 😉

@royentsoc.bsky.social @dipterists.bsky.social
December 23, 2025 at 4:16 PM
Day 19 of #InsectAdvent

Santa has a sac full of presents, so does Villa cingulata but hers is full of sand. Her sac is at the end of her abdomen & here she is twerking to get the sand to coat her eggs (on exit) to prevent desiccation - cool mum 😎

@royentsoc.bsky.social @dipterists.bsky.social
December 20, 2025 at 7:09 PM
Day 17 of #InsectAdvent.. Big day is almost upon us. Have you hung your baubles yet?

What about this specimen belonging to the most bauble of flies Celyphidae (beetle flies or beetle-backed flies). Mostly metallic with their enlarged scutellum grown over their abdomen

@royentsoc.bsky.social
December 18, 2025 at 4:34 PM
Day 18 of #InsectAdvent - LET IT SNOW

Chionea (Limoniidae) are a genus of wingless craneflies commonly called Snow flies (not found in UK but 'strongly suspected' that they are here...). Adults can be seen scuttling across the snow in the winter

@royentsoc.bsky.social @dipterists.bsky.social
December 19, 2025 at 1:01 PM
Day 8 of #InsectAdvent

Want to attract the opposite sex but fed up being bashed on the dancefloor? This male fly, Deuterophlebia sp., never lands but dances over fast-flowing rivers, guarding it for a receptive lady, using its really long antennae to make/guard his space

@royentsoc.bsky.social
December 8, 2025 at 1:43 PM
Day 9 of #InsectAdvent and our thoughts turn to a Christmas vacation.

And where best to go than Christmas Island where we can find Syritta maritima - one of the compost hoverflies whose larvae (the munching maggots) will recycle our leftovers

@royentsoc.bsky.social @dipterists.bsky.social
December 9, 2025 at 12:02 PM
🎄 Celebrating Christmas Eve's #InsectAdvent order: #Strepsiptera, bizarre & brilliant parasites, and RES mascot since 1833.

Their morphology & history mean they’re rarely seen. Many entomologists describe them as one of the strangest insect orders.

🔗 buff.ly/U7pmiwX
Classification of Insects - Strepsiptera
Strepsiptera (c) Hallvard Elven Artsdatabanken
www.royensoc.co.uk
December 24, 2025 at 12:01 PM
Day 7 of #InsectAdvent

There’s always the one team member that gets legless.

And so did this mosquito. Luckily for us this specimen was identified as Aedes macintoshi - an absolute youngster having only been described in 1985!

@royentsoc.bsky.social @dipterists.bsky.social
December 7, 2025 at 2:39 PM