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  • Specimen of the Week 259 : Bird of Paradise

    By Jack Ashby, on 30 September 2016

    Less bird-of paradise skeleton. LDUCZ-Y1696

    Less bird-of paradise skeleton. LDUCZ-Y1696

    If natural selection can be summarised as “survival of the fittest”, how is it that some animals have evolved features that seem to be rather unhelpful to their survival? Deer antlers, peacock tails and babirusa tusks do not help an animal to stay alive. Darwin asked a similar question in The Origin of Species, and also came up with an answer – sexual selection.

    Sexual selection is a sub-set of natural selection, where the driving force is not on the animal to survive, but instead to have the most descendants. It is the mechanism by which species evolve weapons that help them fight off rivals; ornaments that make them more attractive to the opposite sex; or behaviours that ensure sexual encounters result in more or fitter babies. One of the best examples of absurdly ornamented animals are male birds-of-paradise. (more…)

    Specimen of the Week: Week 165

    By Jack Ashby, on 8 December 2014

    Scary MonkeyWhen Specimen of the Week first arose from its fossil ancestors in the Early Blogocene, the niche it originally occupied was to shed light on the darkest corners of our stored collections.

    Over time, there has been some descent with modification. Specimen of the Week maintains its ancestral characters and still has the ability to show the world what museums have in their drawers; but it has also acquired some new adaptations where something amazing is revealed about well-known specimens. Some suspect sexual selection is at work.

    This week, a new mutation has arisen. Instead of lifting the lid on stories from the stores, this Specimen of the Week will shed light on glimpses of horror in a specimen’s database records. Time will tell whether this adaptation will become fixed in the Specimen of the Week population.

    This week’s Specimen of the Week is… (more…)