About 15mm sized Shield Bug. In the photos there are three different individuals, and the second and third photo shows a male and a female (mating and just after mating). The video is filmed just after mating.
Urban park, Maputo, Mozambque.
I have found notes on observations of this Shield Bug from different pards of Africa and India. It can cause a lot of damage to crops, and are considered a pest. It is known to be difficult to kill with insecticide and it feeds and breeds on a wide variety of plants including poisonous ones like Jatropha and Castor. It has been reported on sorghum, maize, rice, okra, sunflower, Noog Abyssinia (Guizotia abyssinica), Star Burr Acanthospermum hispidum, Jatropha podagrica, Jatropha curcas and cotton. In the past cotton cultivation was abandoned in parts of Tanzania due to the Rainbow Shield Bug. Since The Rainbow Shield Bug suck the sap from developing seeds leading to seeds dropping prematurely or not developing fully, it is important that famers to "time" the sowing so that the fruiting body is fully developed when the dry season hits, and the bugs find it more difficult to find food. A study from Ghana (Kaufmann 1966) found that the population was mainly self controlled. Nymphs eat eggs, thus a higher density of nymphs reduces the number of eggs for the next generation. Natural enemies are not mentioned as a controlling factor. (a lot of the information above is received from a PDF-file named "2010-01 Alert Rainbow Shield Bug", it can be found here: http://pythonkit.com/Assassin-Bugs-Fact-...)