advice alert animals announcement appropriate-behavior appropriate-behaviour black care careful caution communicating communication concern control controlled directions dog dogs information informing lead leash message nature nature-reserve outdoor-activity outdoors park pet pets public requirement restrain restrained restricted restriction rules sign signs text under-control warning white words aap Africa lemur maki mammal mammals monkey monkeys ring-tailed ringstaart ringstaartaap ringtailed bleached bones decay dry skull calf cow hippo hippopotamus skin teeth tusk water wet closeup croc crocodile eye nile scales bird cutout flamingo Flamingos isolated shadow shape silhouette ibis wading frog toad