Ingo Arndt / Close up of webbed foot of Surinam toad {Pipa pipa}

Ingo Arndt / Close up foot of Double crested basilisk {Basiliscus plumifrons}

Ingo Arndt / Close up of foot of Hen harrier {Circus cyaneus}

Ingo Arndt / Close up of foot of Slender loris {Loris tardigradus}

Ingo Arndt / Close up of fin of Loggerhead turtle {Caretta caretta}

Ingo Arndt / Close up of foot of European mole {Talpa europaea}

Ingo Arndt / Close up of claw of Northern lobster {Homarus americanus}

Ingo Arndt / Close up of foot of Chimpanzee {Pan troglodytes} opposable toe

Ingo Arndt / Close up of foot of Jewel chameleon {Chamaeleo lateralis}

Ingo Arndt / Close up of webbed foot of African clawed frog {Xenopus laevis}

Ingo Arndt / Close up of underside / sole of human foot {Homo sapiens}

Ingo Arndt / Close up of foot of Hen harrier {Circus cyaneus}