- African and South American native cultures: traditional indigenous life, daily activities. I am not staging action, but instead I let impromptu situations happen, getting a feeling as close as possible of life in villages or of interaction with the environment, not imposing my presence. Some of the ethnic groups photographed are no longer accessible or their way of life has changed drastically, which adds to their documentary value.

- Images of tropical nature: relationship between the elements of the picture, taking an ecological approach: geography, geology, geomorphology, hydrology; biomes, ecology: rainforest and deforestation, savanna, desert, aquatic, mountain vegetation; life forms.

- Economy of Brazil: mining, tourism, agriculture, industry.

- Europe and USA, some Asia.

- Automobile racing and rally.

My markets for stock photography are mostly education (online and textbooks) and travel publications; I am careful to correctly identify photographs with scientific name whenever relevant and possible, consulting specialists. I will do additional research if requested.

A page of links and books presents related scientific articles written by specialists, verified for legitimacy.

Additional or peripheral information with links to relevant articles or books on some galleries (presently: Africa: People of the Sahel - Kanem and Lake Chad , The Hoti of the Guiana Highlands of Venezuela)and The Libinza of the islands of the Ngiri River in the Congo) can be found in my blog.