Lion cub sitting with adult male - Africa

Adult male marsh harrier sparring with juvenile in flight

Ucayali bald-headed uakari juvenlie male sleeping, showing pale eyelids used to signal a 'non-threatening state'

Immature male green thorntail

Kwakane, young male mountain gorilla in day nest

Frontal view of perched sub-adult male Venezuelan sylph

Immature male violet-bellied hummingbird, perched on branch

Male sub-adult springbok