Pete Oxford / Scalesia (Scalesia pedunculata) forest showing crown shyness, highlands of Santa Cruz Island, Galapagos Islands, Ecuador

Pete Oxford / Rainforest, Iwokrama Rainforest Reserve, Guyana

Tim Fitzharris / Forest canopy of O'hia trees showing crown shyness, Lava Tree State Park, Hawaii

Ingo Arndt / Kapur (Dryobalanops lanceolata) forest showing crown shyness, Selangor, Malaysian Peninsula

Ingo Arndt / Kapur (Dryobalanops lanceolata) forest showing crown shyness, Selangor, Malaysian Peninsula

Christian Ziegler / Looking up into leafless canopy in the winter showing crown shyness, blue hour, Jasmund National Park, Ruegen, Germany

Winfried Wisniewski / Rainforest canopy crown shyness, Oahu, Hawaii

Mark Moffett / Kapur (Dryobalanops lanceolata) trees showing crown shyness, Malaysia

Mark Moffett / Crown shyness among secondary growth trees, Selangor, Peninsular Malaysia

Willi Rolfes/ BIA / Beech (Fagus sp) trees in spring, Ruegen Island, Mecklenburg-Vorpommern, Germany

Matthias Breiter / Northern lights above taiga, central Alaska

Winfried Wisniewski / Rainforest canopy crown shyness, Oahu, Hawaii