angles appearance communicating communications communications-equipment connecting distant distinctive electrical-signals electromagnetic equipment exterior external height high light mobile-phones modern radio-waves receivers receiving sending Signals slender steel steel-structure tall technical technology telecommunications telephones telephony tower towering transmission transmissions transmitters transmitting animal arboreal brazilian callithrix-argentata callitrichids colored colorful colors coloured colourful colours diurnal endangered-species flesh-colored-ears forager foraging mammal mico-argentatus monkey New-World-monkey omnivore omnivorous primate silvery-marmoset Singapore-zoo small tropical-rainforests-habitat whitish-silver-grey zoo architectural architecture Australian closed color colour craftsmanship dark decorated decorative doors entrance fitting historic historical history linear lines old ornamental ornamentation patterned patterns pillar plain safety shadows solid sombre steps stone stonework style textures walls abstract angled background bricks checkered concrete contrast contrasting designed detailed detailing driveway gray grey grooved ground level non-slip pattern pavement pavers paving paving-bricks rectangles rectangular shaped shapes smooth surface surfaces textured building contemporary edged edges elements framed frames geometric geometric-shapes high-rise perspectives sharp Singapore views wall windows bloom blooming blooms buttercup-family display evergreen flora flower flowers foliage green Hellebore Hellebores Helleborus Lenten-rose low-growing perennials poisonous Ranunculaceae rhizome-rooted shrub shrubbery subtle-shades toxic toxicity white