Interestingly, other three wall lizard species living in high crowded islands also seem to present a similar pattern, with females presenting male-like UV-blue patches (blue in the phylogeny).

We think this pattern of reduced social signalling could have arisen ought to the high lizard density population, which discourages territorial behavior and promotes social tolerance, making most social signals unnecessary.

We found that Podarcis lilfordi gigliolii does not display foot shakes and that the UV-blue patches likely have lost their function because they do not correlate with traits of quality and they are not sexually dimorphic.

What happens to social signals under insularity conditions? Take a look to our new paper to find out what we saw in wall lizards from Dragonera Island:

What happens to social signals when high population density impedes territorial behaviour? Hot-of-the-press new study by @DelacruzFerran examines this question in the crowded island of Dragonera, where Lilford's wall lizards often pile upon each other! https://t.co/S9JKN4rFn3

El pasado fin de semana estuve en el Mar Menor. Lo que vi allí fue dantesco, casi increíble en su sentido más literal. Kilómetros de animales muertos, tanto dentro como fuera del agua, además de miles de peces y crustáceos agonizando tratando de encontrar oxígeno en la superficie

One of Pyrenees many endemisms: Calotriton asper, the Pyrenean brook. What a majestic creature.

Happy to share our new paper on @Ecol_Evol , a team effort aiming to investigate social behaviour and space use in the colour morphs of Podarcis muralis. The title is a bit of a spoiler but well, don’t they say that science is refutation? (1/n) https://t.co/kE8EkmCSla

New research on wall lizards' ventral colour polymorphism! This time we used a mating experiment to examine the existence of alternative breeidng strategies in females and/or inter-morph incompatibilities affecting newborn viability and early behaviour. https://t.co/LATwnHdujg