Home / News / Researchers use drones with thermal cameras in flying fox count

Researchers use drones with thermal cameras in flying fox count

Flying foxes, a species that are listed as vulnerable to extinction due to a drop in numbers, are being detected and counted using drones carrying thermal cameras, researchers say.

A joint effort between the Western Sydney University and the Taronga Conservation Society has come up with the method. A paper about it has been published in the journal Remote Sensing In Ecology and Conservation.

The grey-headed species is known by the scientific name Pteropus poliocephalus. The new method of using drones had been verified to be accurate by comparison with ground counts in single trees to counts obtained from the drone, from repeated drone surveys, and from multiple human counters.

Advanced image detection techniques, including machine-learning and computer vision methods to semi-automate flying-fox counts from the drone-acquired imagery are also being utilised.

“We can now use drones to obtain accurate and precise measures of colony abundance semi-automatically, thus greatly reducing the amount of human effort involved for obtaining abundance estimates”, said lead author and Master of Research graduate Eliane McCarthy at the Hawkesbury Institute for the Environment.

thermal off

A view of the trees from a drone with a thermal camera turned off. Supplied

“At present there are two main methods for getting accurate counts of a flying-fox colony: during the day, when the flying-foxes are roosting and therefore quite static, or during the evening when they leave the roost to forage on nectar and fruit and can be counted as they depart the roost.”

Co-author Dr John Martin, a research scientist at Taronga, said: “However, there are several issues in conducting ground surveys: the terrain can be difficult and physically challenging for counting personnel and their presence can disturb rooting flying-foxes, reducing the accuracy of the estimate.

“Fly-out counts rely on rapidly counting fast-moving animals at dusk, when the light is fading, complicating these assessments.”

thermal saving flying foxes

A view of the same trees with the thermal camera turned on. Supplied

Another co-author, Associate Professor Matthias Boer, said: “We demonstrated that drone-acquired thermal imagery can be used to accurately and precisely quantify the abundance of flying-foxes in a roost, and that semi-automated methods for counting flying-foxes in thermal imagery are comparable to human assessments in their accuracy.”

And the remaining author, Associate Professor Justin Welbergen, added: “This method is very valuable for reliably monitoring the abundance of individuals in flying-fox roosts and will aid in the conservation and management of this globally threatened group of flying-mammals, as well as other warm-blooded tree-roosting species.”


The much awaited iTWire Shop is now open to our readers.

Visit the iTWire Shop, a leading destination for stylish accessories, gear & gadgets, lifestyle products and everyday portable office essentials, drones, zoom lenses for smartphones, software and online training.

PLUS Big Brands include: Apple, Lenovo, LG, Samsung, Sennheiser and many more.

Products available for any country.

We hope you enjoy and find value in the much anticipated iTWire Shop.



iTWire TV offers a unique value to the Tech Sector by providing a range of video interviews, news, views and reviews, and also provides the opportunity for vendors to promote your company and your marketing messages.

We work with you to develop the message and conduct the interview or product review in a safe and collaborative way. Unlike other Tech YouTube channels, we create a story around your message and post that on the homepage of ITWire, linking to your message.

In addition, your interview post message can be displayed in up to 7 different post displays on our the iTWire.com site to drive traffic and readers to your video content and downloads. This can be a significant Lead Generation opportunity for your business.

We also provide 3 videos in one recording/sitting if you require so that you have a series of videos to promote to your customers. Your sales team can add your emails to sales collateral and to the footer of their sales and marketing emails.

See the latest in Tech News, Views, Interviews, Reviews, Product Promos and Events. Plus funny videos from our readers and customers.


Article Source

About admin

Check Also

Library links – Drones in the library

Article content Drones, you’ve seen them on the news, read about them in articles, sometimes …

PowerVision PowerEgg X Drone Review: What In Tarnation Is This?

Picture an egg. Now picture an egg with a camera on it. Now picture an …