 I'm looking at the home ranges of wild male orangutans in Spangal, Pete Swamp Forest here in Calimantan. I'm looking at how far they're moving, what they're feeding on, when they're going to different parts of the forest, and also looking at dispersal, whether they're moving away from the area where they're born into different parts of the forest and at what stage in their life they do that, whether it's when they're young or when they're unflanged males. So they're adults but they haven't got their secondary sexual characteristics of the flange male face or whether they go actually when they're flanged and they've got a better chance of being dominant in a different place. So my research, I go and we find the orangutans, we listen for long calls. That's the easiest way to find them. But the flange males are the only ones that do the long call. I try and find them like that. When I find them we follow them up for a period up to 10 days. So far I've done it for 8 days but the forest gets quite difficult after that. And then I'm collecting fecal samples and I'm going to different research sites as well, different sites around, so 5 kilometres from camp, 10 kilometres from camp, 7 kilometres and the areas between to try and find orangutans that may have found in a different place, collect a sample, try and take the photograph as well. And then once I've got all that data and done the genetic analysis I'll be able to see whether we've got males in one area, which is the same male that I found in one area is in another place. We know what the home ranges of females are because they're quite limited. So within our grid we've got 7 females and we've pretty much mapped out the areas that their home ranges are, but the males is a much larger area and we don't know how large that area is, which for conservation purposes that's very important because you need to know the area that a male orangutan should be living in for a viable population and their size for a viable population. So I'm also looking at the overlap of the males as well. So how many males can live in one area at the same time? There's a lot of parts of the Peat Swamp Forest which is outside the National Park and a lot of that has been sold to dog and concessions or to palm oil companies. Some of the companies are trying to work with conservationists to say okay we're going to be making this into a plantation but if we leave an area then how large that area needs to be. So my hope is that the research that I can do here will show okay if you're going to leave a forest it has to be this large to actually have a population size that is viable and this area for them to all survive with the amount of fruit that they have in the forest. They're not territorial, no. So there's a lot of overlap because of the ranges that they have and the forest because they're not a group living species like a gorilla where you can have a male who can protect his mates and he'll be the strongest male in that area. If another male comes along he'll come and take the females or there'll be a chest beating and such like. With the orangutans there's no way that they can do that because they're semi-solitary so most of the time they're live, they're by themselves. You do get associations with females and males but they'll be for three days, three or four days with several matings and then they'll move off again so you can't have any kind of territoriality in that respect. Within Sabangal, 7,000 orangutans in about five and a half thousand kilometres squared so with the males because we'll have males on the board we've been doing this research since 2004 and the males will take pictures with doing ID cards and you'll see them for a year, then they'll disappear and then they'll come back again, you'll see them two years later or you never see them again and they're not all dying but you don't know when they're coming back. So where are they going? That's the question really. Because there's a good research site here already and I should be able to move through the areas I looked at the different sites and I can get access to quite a lot of these different places either by boat or walking out into some of these places in the dry season especially, in the wet season to try and walk 12 kilometres it's crazy. It sounds very strange but it'll take you to do two kilometres and this forest will take you an hour to walk that, two kilometres whereas in the UK or wherever you are then it's much quicker to move around so it's quite difficult. There are these aspects which took a lot of logistical tinkering to get it sorted out. So when do you expect to finish there? I finished my field work in October this year and then go back to Cambridge to do the write-up and I send my samples off to Zurich to get the DNA analysis then the genetic analysis.