Jack Dykinga / Striated sandstone eroded in circular pattern, dawn, Vermilion Cliffs National Monument, Arizona, USA

Jack Dykinga / Eroded striated sandstone (petrified sand dunes), Vermilion Cliffs National Monumant, Colorado Plateau, Arizona, USA

Jack Dykinga / Eroded sandstone (petrified sand dunes) in banded striated patterns at sunset, Colorado Plateau, Arizona, USA

Jack Dykinga / Eroded striated sandstone with round concretions strewn in geometric patterns, dawn, Vermilion Cliffs National Monument, Colorado Plateau, Arizona, USA

Jack Dykinga / Eroded sandstone (petrified sand dunes) in banded striated patterns at sunset, Colorado Plateau, Arizona, USA

Andy Rouse / Striated / Forster's caracara (Phalcoboenus australis) group surrounding penguin chick, Falkland Islands (non-ex)

Andy Rouse / Gentoo penguin (Pygoscelis papua) chick about to be killed by flock of Striated Caracara {Polyborus plancus} Falkland Islands

Tim Fitzharris / Sandstone striations and erosional features, Badlands National Park, South Dakota

Solvin Zankl / Striped / hairy frogfish {Antennarius striatus} Lembeh, Sulawesi

Hanne & Jens Eriksen / Striated heron (Butorides striata) with Scorpionfish (Scorpaenidae) in beak, standing on rock. Oman, November

Ann & Steve Toon / Greenbacked heron (Butorides striatus) peering from perch, Zimanga private game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / Greenbacked heron (Butorides striatus) walking through water, Zimanga private game reserve, KwaZulu-Natal, South Africa.