Many of the trees I have photographed have survived because they are out of reach of civilization; on mountainsides, private estates, or on protected land. Certain species exist only in a few isolated areas of the world. For example; there are 6 species of spectacular baobabs, found only on the island of Madagascar. Sadly, the baobab is now one of the three most endangered species on the island.The criteria I use for choosing particular trees are basically three: age, immense size or notable history. I research the locations by a number of methods; history books, botanical books, tree registers, newspaper articles and information from friends and travelers.