two viviparous lizards sit on an old dry log and bask in the sun. polymorphism of lizard coloration

animal background bask basking biology brown camouflage close closeup coloration common creature day detail dry environment fauna grey habitat head herpetology horizontal lacerta lizard lizards log macro natural nature old one outdoor pattern polymorphism reptile reptilian rock scale scaly single sit skin small summer sun tail two vertebrate vivipara viviparous wild wildlife wood wooden zootoca