Coat buttons (Tridax procumbens) belong to the sunflower or daisy family (Asteraceae). Native in Central America, this plant was introduced as an ornanment but spread so quickly that it is now considered as a weed.
Many animals pollinate the flowers of the coat button. All the photos were taken at the same locality on the same day :). Above is a day flying moth (Syntomis huebneri). You can see the long proboscis of the moth reaching into the inflorescence (known as a capitulum).
And burying its head into it in order to reach the nectar!
As for the fruits? There are many long feathery hairs called pappus that helped it to drift in the wind, helping it to disperse efficiently. No wonder it can be found everywhere.
Even tiny things can be amazing if u take a closer look at them!