A guide to using drones to study wildlife: first, do no harm


Jarrod Hodgson and Lian Pin Koh

Technological advances have provided many benefits for environmental research. Sensors on southern elephant seals have been used to map the Southern Ocean, while tracking devices have given us a new view of mass animal migrations, from birds to zebras.

Miniaturisation of electronics and improvements in reliability and affordability mean that consumer drones (also known as unmanned aerial vehicles, or UAVs) are now improving scientific research in a host of areas. And they are growing more popular for wildlife management, as well as research.

Wildlife drones can be used in many different ways, from small multi-rotor units that can scare invasive birds away from crops, to fixed-wing aircraft that fly above rainforests to spot orangutan nests. UAVs have also been shown to provide more precise data than traditional ground-based techniques when it comes to monitoring seabird colonies.

Other industries, from mining to window-cleaning, are looking at using drone technology. Some forecasts predict that the global market for commercial applications of UAVs will be valued at more than US$127 billion. Given their usefulness in the biologist’s toolkit, the uptake of UAVs for environmental monitoring is likely to continue.

But this proliferation of drones raises questions about how best to regulate the use of these aircraft, and how to ensure that wildlife do not come to harm.

A UAV-mounted camera provides an aerial view of a Sumatran elephant (Elephas maximus sumatranus) in North Sumatra.
L. P. Koh

Wildlife disturbance

Biologists carrying out field studies are typically interested in animals’ natural state, or how their behaviour changes when conditions are altered. So it is important to know whether the UAVs disturb the animals and, if so, exactly how.

Of course, different species in different environments are likely to have very different responses to the presence of a UAV. This will also depend on the type of UAV and how it is used. Our current understanding of wildlife responses is limited.

A team of French and South African biologists observed the reaction of semi-captive and wild birds to UAVs. They found that the approach angle had a significant impact on the birds’ reaction, but approach speed, UAV colour and flight repetition did not.

In polar regions, where UAVs may be particularly useful for sampling inaccessible areas, researchers found that Adélie penguins were more alert when a UAV was in range, particularly at low altitudes.

These studies, and similar observational studies on other animals besides birds, provide an initial understanding of wildlife behaviour. But the animals’ behaviour is only one aspect of their response – we still need to know what happens to their physiology.

Cardiac bio-loggers fitted to a small number of free-roaming American black bears in northwestern Minnesota have shown that UAV flights increased the bears’ heart rates by as much as 123 beats per minute. Even an individual in its winter hibernation den showed stress responses to a UAV flying above.

Interestingly, the bears rarely showed any behavioural response to the drones. This shows that just because animals do not appear visually disturbed, that doesn’t necessarily mean they’re not stressed.

A code of practice

We have developed a code of best practice, published today in the journal Current Biology, which seeks to mitigate or alleviate potential UAV disturbance to wildlife. It advocates the precautionary principle in lieu of sufficient evidence, encouraging researchers to recognise that wildlife responses are varied, can be hard to detect, and could have severe consequences.

Jarrod Hodgson launches a fixed-wing UAV on Macquarie Island.
J. Hodgson

It also provides practical recommendations. The code encourages the use of equipment that minimises the stimulus to wildlife. Using minimum-disturbance flight practices (such as avoiding threatening approach trajectories or sporadic flight movements) is advised. The code also recognises the importance of following civil aviation rules and effective maintenance and training schedules, and using animal ethics processes to provide oversight to UAV experiments.

The code isn’t just food for thought for biologists. It is relevant to all UAV users and regulators, from commercial aerial videographers to hobbyists. Unintentionally or otherwise, such users may find themselves piloting drones close to wildlife.

Our code urges the UAV community to be responsible operators. It encourages awareness of the results of flying in different environments and the use of flight practices that result in minimum wildlife disturbance.

Low-impact conservation

As researchers continue to develop and refine UAV wildlife monitoring techniques, research that quantifies disturbance should be prioritised. This research will need to be multi-faceted, because responses could vary between species or individuals, as well as over time and in different environments. Greater knowledge could help us to draw up species-specific guidelines for drone use, to minimise disturbance on a case-by-case basis.

UAVs are a useful wildlife monitoring tool. We need to proactively develop and implement low-impact monitoring techniques. Doing so will expand our technological arsenal in the battle to manage Earth’s precious and increasingly threatened wildlife.

The Conversation

Jarrod Hodgson, PhD Candidate and Lian Pin Koh, Associate Professor

This article was originally published on The Conversation. Read the original article.

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Tips for Google Maps


The link below is to an article that offers 7 tips for using Google Maps.

For more visit:
http://www.makeuseof.com/tag/be-your-own-travel-guide-7-tips-to-travel-smarter-with-google-maps/

Climate Change: Trees Using Less Water


The links below are to articles reporting on how trees are using less water as a response to climate change.

For more visit:
http://news.mongabay.com/2013/0711-forests-water-co2.html
http://inhabitat.com/trees-are-adapting-to-climate-change-by-using-water-more-efficiently/

8 Tips to Using a Dehydrator to make tasty hiking food!


Lotsafreshair

One of the questions I get asked most is what do I eat in the bush? It might also explain why my Basic Food for Hiking Video is the 2nd most popular on the channel. Us hikers love our food!

With all that fresh air and exercise, we sure build up healthy appetites and I’m not convinced that all of it is about ensuring correct nutrition (see A Little Tipple in the Bush). So how do we guarantee tasty, healthy food, whilst keeping pack weights to a minimum? How do we enjoy such treats as Mussaman Lamb or Spag Bol in the middle of the wilderness?… The answer is dehydrating!

If alchemy is the art of turning lead into gold, then dehydrating is like some strange kind of bushwalking alchemy. Here’s some tips to get you started!

  1. The Dehydrator

    Dehydrators are made up of a number of trays.  In…

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BioFuel Advance: Using Kelp to Produce Ethanol


The following link is to an article about producing ethanol from seaweed, thereby reducing the need for terrestrial biofuel crops.

For more visit:
http://news.mongabay.com/2012/0120-kelp_power.html

Check In: Day 2 of Holiday


I have had a most interesting couple of days on the road and in the bush. Currently I’m in a motel room at Woolgoolga, near Coffs Harbour on the mid-north coast of New South Wales, Australia. ‘Hardly the wild,’ I hear you say, and you’re quite right – it isn’t. The weather was beginning to change I noticed on the final leg of my day’s itinerary, so I decided to hide out in a motel room for the night – good decision, it’s pouring outside.

I won’t give all away – I’ll leave the main description of the holiday to the website – but just some of the ‘downlights’ of the first couple of days for this post.

I didn’t arrive at Cathedral Rock National Park until just on dark, but did get the tent up prior to darkness arriving – when it did, it was dark! The campfire took an eternity to get going as all of the timber was damp and by the time I got it started it was time for bed – all-be-it an early night (7.30pm). I had decided to not spend the money on replacing all of the gear I needed to replace for camping, following the loss of a lot of gear over the years due to storage, etc. I hadn’t done much in the way of bushwalking or camping for years due to injuries sustained in my car crash and a bad ankle injury, so I left it all a bit late. I figured that for this holiday I’d make do and replace the gear with quality gear before the next trip. In short, I’ll get by – but it would have been nice to have some good gear just the same. It was a very cold night let me tell you – and long.

When I reached the heights of my first walk today, standing on top of Cathedral Rock National Park, my digital camera decided to die on me. I knew there was something wrong with it during the ascent as it was really chugging away taking pictures. I did get a couple of reasonable panoramic shots on the top of Cathedral Rock before it died, so that was good. I took stills with the video camera I was using, so it wasn’t a complete loss. When I completed the Woolpack Rocks walk I made the trip to Coffs Harbour to seek a replacement and got one for a reasonable price. It’s just another compact and so I will also buy a digital SLR prior to my next trip I hope. My previous SLR was basically destroyed when the camera cap came off during a multiple day bushwalk and all manner of stuff got into it. It wasn’t digital so I didn’t bother repairing it.

So tomorrow – off to Dorrigo National Park I hope and several lengthy walks I haven’t done before. Hopefully the rain will clear.