This week’s post is from Lauren Sumner-Rooney, a post-doctoral researcher at the Museum für Naturkunde. If you would like to write for Anatomy to You, get in touch via Facebook or Twitter. The featured image shows a specimen of a new species of Zetela (a snail), removed from its shell. Image: Natural History Museum, Specimen: Museum National…
Tag: vision
Birds and others use structural trickery to produce vibrant blue colours
Peacocks, kingfishers and bluebirds are among some of the most eye-catching of birds, and in many cultures are particularly admired for their rich blue colours. We have long known that red and orange birds take their colour from their food, extracting pigments in the plant and animal matter they consume. Flamingoes are possibly the best-known example,…
Ole’ blue eyes: scallops and clams have unique ‘mirrored’ eyes
It may seem alien, but think about this the next time you enjoy a scallop or a clam: they might be looking back at you. Some species have tens of tiny eyes which line the edges of their characteristic shells. Unlike almost all other adult bivalves, scallops and clams can grow eyes which use a unique…
Dragonfly eyes detect up to 30 different ‘colours’
Our retinas contain four different types of light-sensing photoreceptor cells: rods, which detect low levels of light, and three cone cell types which detect red, blue and green wavelengths of light. These allow us to see in (relative) black and white when it’s dark, and in vibrant colour when it’s lighter. The wavelengths that different animals…
Flamboyant cuttlefish Metasepia pfefferi can see polarised light and may use it as a secret language
No prizes for guessing how the flamboyant cuttlefish got its name, then! This delightful species actually has surprisingly poor colour vision – but they have got another brilliant visual trick up their many sleeves. Cuttlefish are able to see polarisation; the plane of incoming light. It is even possible that they use this ability, together with their…
Anatomy To You 