Myzomela sanguinolenta (Scarlet Honeyeater)

IUCN Status: Least Concern.

There is a term that springs to mind when I think about this species: sexual dimorphism. It refere to the difference in form between the genders of the same species. It's common among birds for the male of a spieces to have more vivid colouration. However with this species the difference between the outrageously colourful male (next photo) and the completely bland brown female (shown here) is dramatic.

In other animals like frogs or spiders, the differences can be even more profound: size and shape can varies as well as colouration. Luckily for us the male and female of our species are exactly the same.