Wildlife photographer and Canon Ambassador Christian Ziegler, a trained tropical ecologist, has worked in rainforests for more than 25 years. The four-time World Press Photo award winner is a founding fellow of the International League of Conservation Photographers, and says: "Meaningful work, for me, is all about conservation – not the pretty picture, but the content that helps conserve a species or an area."

Here, in the second of our Candid Conversations, connecting esteemed photographers with rising stars in their field, Christian joins fellow Canon Ambassador Marc Albiac in conversation. Marc, who was Young Wildlife Photographer of the Year winner in 2014, is also a biology student and shares an interest in conservation. The two talked from their homes – Marc from Barcelona and Christian from southern Germany, near Lake Constance, where he recently moved after 15 years living mainly in Panama.

Marc: Can I ask, how and when did you get into photography?

Christian: Late! I was 20 years old. I took a course to learn drawing, and I realised I'm not good at it. I looked at photography because I thought maybe I would be better at that. I got an old camera. Then I went to Thailand for a year. Back then not many people photographed the rainforest, and I wanted to share my experience with my friends. This is how I started seriously considering taking nice pictures. I went back to study biology, and then I recorded everything just to show people what I was doing. It was very scientific, at first. This was 27 years ago. I'm old!

Marc: I'm excited to see the results of this trip. Which cameras and lenses will you take with you?

Christian: I'll take Canon 球探体育比分_欧洲杯足球网乐￥在线直播5 cameras. They're smaller! I have been working with them for half a year, and the quality is superb. For me, it's important that the camera is very quiet too.

Marc: Yes, because to do close-up photography, you need to be quiet.

Christian: Yes! Because of the moisture in the forest, I try not to change lenses a lot. I use the Canon RF 100-500mm F4.5-7.1 L IS USM, the wide-angle Canon RF 15-35mm F2.8L IS USM, the Canon RF 100mm F2.8L Macro IS USM, and the Canon RF 24-105mm F4L IS USM for general background shots. I also have five flashes. I like to use flash for small subjects. I think you use flash a lot too?

Marc: Well, it depends. I like to photograph snakes and frogs and all these kinds of animals, so most times I don't use flash, unless I don't have light or if I want a special photo. If it's possible, in order to be fast, I photograph them using natural light.

Christian: Okay. I use flash a lot, but with a flash exposure compensation setting of -1 or -1.2 to reduce the flash intensity, just to put in a little light. I think most animals like frogs don't care about flash?

Marc: No, they don't care. I went to Costa Rica in February and most of my photos there were taken during the night.

Christian: I saw the pictures. Nice crops. Costa Rica is one of my favourite places. Where did you go?

Marc: Four years ago, I wanted to photograph a pine marten that was 150km from my home. My father took me there six times before I managed to photograph one. I think it was December, and it was fantastic to see – I got only two photos.

Christian: Amazing. That's the trade-off – invest a little more in the shot, maybe get a better result.

Marc: Are there times that you haven't gotten the shot?

Christian: I tried for a tiger in Bhutan for a year and a half, and I got a nice picture, but I think I need a better one – he's a little off-centre.

Marc: Is there any animal that you haven't got pictures of?

Christian: Yes, many. The orange pigs of the Congo Basin – herd animals in a group of 20-50. I think many of the little, weasel-like creatures, of which there are about six or seven different sizes. Civets, a weasel, genets, the golden cat. No pictures exist of these animals in the wild. I hope to get pictures of a giant pangolin.

Marc: Have you captured pictures of animals you didn't expect in camera traps?

Christian: Yes. A pheasant that appeared and danced in a trap for a red panda. And then, really deep in the forest, a common dog appeared! It was a full day from the nearest village, so I don't know how. Basically, there are a lot of false alarms – leaves falling, maybe a blade of grass. The most common thing is nothing. A moth often triggers it, or a bat.

Marc: I have those too. When you achieve the photo, I think it feels even better after the challenge. Okay, so I was hoping to talk about conservation.

Christian: It's really important to talk about it. What I do is all for conservation.

Marc: Has that always been the most important thing for you?

Christian: In the beginning, it was not. But then I travelled to Borneo, Thailand and Africa, areas where the forest is really threatened. In Madagascar, only 7% of the forest still exists. I now choose projects that highlight conservation issues – I did a lot about cassowaries, bonobos and chameleons, because they are all threatened. I highlight these creatures in their natural habitat, because it is shrinking massively and we need more coverage of this. Borneo right now is 27% forested, but in 20 years it will be less than 10%. Africa is worse – in Madagascar, it's worse still. This is why I'm travelling to Congo – because it's the last area that is un-hunted, maybe for the next 10 years.

Marc: How do you think photography can help conservation?

Christian: When I publish in GEO or National Geographic, people learn about this amazing area. I talk with the writer to explain how amazing it is, and how it's threatened. When I look at a project, I ask whether it is helping to conserve nature. If not, I don't go.

Marc: How can photography influence people?

Christian: It's all about the information that goes with the picture. The tiger I photographed in Bhutan exists there because it's fully protected from poachers in that country, but there are only 80 tigers left in Bhutan. It's really important to say that there are so few, and that when they cross the border into India they're lost to poachers. We really spell it out, to support Bhutan.

Marc: I think really well-known photographers can do conservation. But it's difficult to get into if you don't have a magazine to run your work.

Christian: I think this is why competitions are good, because you reach many people who learn about your photography and its purpose. I think competitions are also useful for us to meet other photographers, to get new ideas, to hang out and maybe learn from each other, because we are alone when we are in the field. Photography is a really hard job – you need friends who do the same, who listen to you, to know that you're not alone.

Marc: One of my dreams is to do conservation photography.

Christian: I think you need to look at it in the long run. I hope many people do the same. My advice is to be a specialist, to be really good at something, ideally in several areas. For example, as a camera trap specialist, a macro specialist or a landscape specialist. So people think of you.