action aerial aerofoils air blue color colour fly glide gliders green hang-gliders hangglider on the move outdoor parachutes paragliders red sky soar sport summer suspend diversity flock group agile ape arboreal Asian bright-eyed climber climbing eating great-apes hairy hanging highly-intelligent intelligent mammals orang-utan orangutan playful playing pongo-abelii primate primates red-haired snacking suspended affliction aggro black and white bother businessman care concern desire difficulty disquiet distress disturbance doubt dreams exasperation fear hang-up headache idea irritation male meditation misgiving musing obsession pain pain in the neck people perceiving perplexed pet peeve problem provocation rationalization rationalizing realizing reasoning reflection regard rumination scrutiny seeing speculation study suit teasing theorization thinking thought thought bubble tie uncertainty understanding uneasiness worker worries worry confused confusion Question questions branch branches ice icicle icy tree winter clouds horizon ocean skies water canada geese colorado dusk eveing goose lake lakes mountain range park reflections sea sunset twilight waters Australia Australian beautiful beauty bough breathe bright calm calmness cirrus cloud conservation contrast creation cumulus ecology environment environmental eucalyptus foliage fresh green and blue greenhouse greening growth gum gum leaves gumleaf happy heaven hope idyllic joy leaf leafy light light and shade nature optimism outdoors overcast oxygen ozone paradise peace plant rural scene season serene shadows spring stratus sun sunlight sunny tranquil twig warming