In terrestrial environments, predator body size is largely correlated with prey body size. The opposite is found for many predators in the marine environment – baleen whales in particular comprise some of the world’s largest mammals and yet they feed on something far smaller (plankton). The leopard seal is unusual in that it feeds both […]
Seabirds are well adapted to acquire their prey. Those that feed on bivalves close to the surface have short, strong bills to break into shells and access molluscan meat, and those that feed on bivalves buried deeper in the sand have much longer, slender bills to access their prey. The association between bill morphology and […]
This was originally posted at: http://blogs.egu.eu/palaeoblog/?p=459 Birds are living, breathing, tweeting dinosaurs. That is scientific knowledge backed up by overwhelming evidence, but the evidence basis for it grows strong all the time. We know that they are related from a host of morphological evidence from the last 150 million years or so. Our understanding of the […]
This was originally posted at: http://blogs.egu.eu/palaeoblog/2013/03/20/fly-my-pretties-fly/ The origin of bird flight is one of the greatest stories evolution has ever told us in the history of life on this planet. To imagine how organisms that once ran around on the ground have descendants that soar through the skies is truly phenomenal, and represents a truly great […]
There’s nothing quite like seeing something in the field. I came to this realisation about half way through my Masters course. When I started, I was a fully-fledged Geoscientist and taking on biological knowledge would have been an immense challenge if it hadn’t been for the engaging, rapid-fire seminars given by Dr Rob Hughes. He […]
This was originally posted at: http://blogs.egu.eu/palaeoblog/2013/02/18/its-just-a-flesh-wound/ Fossils, as we typically think about them, tell us about the death of an animal. The teeth, bones, shells, fragmented pseudopods and other weird and wonderful bits of carcass all only ever reflect one thing: a permanent geological limbo. These types of fossil are known as body fossils. The other […]
In a great many species, females exhibit preferences for larger males – including that world-dominating species Homo sapiens (though a recent PLoS ONE study reveals the effect is only modest in actual couples). Certainly in the marine environment, choices such as this correspond to greater fitness in a species, with larger individuals being more fertile […]
Among the many issues with the fossil record is the case of gender identification. In modern organisms, it is usually pretty easy to tell which members of a particular species are the males and which are the females. This can either be through consistently perving on them to figure it out during copulation, or some […]
Two new feathered dinosaur articles appeared in the latest edition of Nature Communications; one on gender identification in a well-known theropod (the meat noshing ones), and the subject of a forthcoming blog post, and another on a new feathered fiend from, surprise surprise, China. I normally really don’t like writing about theropods, especially of the feathered […]
The fossil record is brutally frustrating; it mostly preserves only vestiges of deaths long past as body fossils, with occasional glimpses of life being gleaned from their surroundings and any trace fossils, or activity fossils that we might find. One question palaeontologists have long been seeking the answer for is how good were dinosaurs as […]