C-DRONE GUIDE · 18 JULY 2026
Livestock counting and monitoring by thermal drone: method and price
A herd of suckler cows spread over 40 hectares of hilly pasture, broken up by hedges and copses: counting them reliably on foot or by quad bike takes a good hour, and it only takes one animal lying down in a dip or in the shade of a copse to throw the total off. Drones, especially fitted with a thermal camera, change that: fifteen to twenty minutes of flight is enough to cover the whole plot and spot every animal, including the ones no eye on the ground would have caught. Here is how a drone headcount works, what it enables beyond simple counting, and what it costs in 2026.
Published on 18 July 2026, reviewed on 2 August 2026 — regulations in force as of August 2026.
Why counting by eye gets unreliable past a few hectares
On a small, flat, open plot, a glance is enough. The problem starts with the size of the holding and the terrain: hilly pasture, hedgerows, woodland edges, gullies and wet patches all offer corners where a lying or shaded animal disappears completely from view, whether you are on foot, on horseback or on a quad. A herd spread across several non-adjoining plots, split by a road or a stream, multiplies travel time and the risk of missing part of it.
The morning fog common in valley bottoms, rain that pushes animals to huddle under trees, or simply the early winter nightfall all make life harder for a farmer who needs to check the herd before heading in. On large suckler herds or mountain summer pastures, a full headcount sometimes takes several people half a day — time few holdings can spare each week for a simple presence check.
How the thermal drone spots every animal, even lying down or in shade
A thermal camera does not look for a shape, it looks for heat: the body temperature of cattle, sheep or horses (around 38-39 °C) stands out clearly against grass, bare earth or undergrowth, even through sparse foliage that would hide the animal from a normal camera. The best window is early morning or evening, when the temperature gap between the animals and their surroundings is largest; in full summer sun, warmed ground can instead narrow that contrast and make the analysis trickier.
The pilot flies a grid pattern at 60-80 m, covering the plot in parallel strips with no blind spots. Thermal images are always paired with a visible-light pass: it confirms each detection (ruling out a still-warm manure heap or a sun-warmed rock) and, often, identifies the animal by its coat or ear tag if the flight drops a little lower. France's livestock institute (Idele) has spent several years developing automated counting algorithms from this kind of imagery; the technology remains at the experimental stage, and the count today is still confirmed by a human reviewing the images.
Beyond counting: calving, lameness and stray animals
Once the crew is on site, the same flight often serves several purposes at once. During calving season, a morning pass can reveal a cow isolated from the rest of the herd — the classic sign of calving underway or imminent — without walking the plot on foot and without stressing an animal already on edge. An animal that is limping, or stays lying down longer than the others, stands out the same way when the images are reviewed, often before a health issue becomes visible from the road.
The thermal drone also helps quickly find an animal that has escaped through a broken fence or bolted during a storm: the same grid method, applied this time to neighbouring plots and woodland edges, locates an isolated animal far faster than a search on foot. We cover this use in our dedicated guide to finding a lost animal with a thermal drone, and the topic naturally pairs with our guide to saving fawns before mowing, where the same crews operate in spring.
What the rules say about flying over a herd
Agricultural flights over pasture and summer grazing land mostly fall under open-category sub-category A3: far from people, more than 150 m from residential areas, below 120 m, with the operator registered on AlphaTango. Flying over a gathering of livestock is no longer formally banned by the rules in force — the ban appeared in older decrees — but professional common sense still calls for a distance and altitude that avoid triggering panic, particularly on the first few passes before the herd gets used to the drone's noise.
Before any flight, the Géoportail drone map remains essential: it flags the military very-low-altitude network (RTBA), corridors used by air-ambulance helicopters, and certain protected natural areas where low-altitude flight is restricted to protect birdlife — restrictions that come up often around mountain summer pastures and wetlands. We cover how to read that map in our guide to the Géoportail drone zone map, and the distinction between categories in open versus specific category.
The price of a counting or monitoring mission in 2026
The price mainly depends on the number of plots to cover, how often you want a pass, and the level of analysis required. Ranges observed in France in 2026:
| Mission | Observed price (excl. VAT) |
|---|---|
| One-off pass on a typical holding (headcount + position log) | €150 to €350 |
| Weekly monitoring through calving season (monthly package, several passes) | €400 to €900 |
| Large herd across several plots, or mountain summer pasture | €500 to €1,200 |
| Emergency search for a stray animal (rapid response) | €150 to €300 |
For comparison, crop-vigour mapping under precision agriculture by drone is priced at €8 to €30 per hectare: livestock counting follows a per-mission logic rather than a per-area one, since image-analysis time weighs more than flight time. Many farmers start with a single pass before switching to a recurring package for the calving season.
Frequently asked questions about drone livestock counting
Does the drone disturb the herd? At the usual flight altitude (60 m and above) and with a gradual approach, most herds get used to it within a few passes and keep grazing normally. The first flight is the trickiest: the pilot watches the animals' reaction and adjusts altitude accordingly.
What weather gives the best thermal contrast? Early morning after a clear night, once the ground has cooled while the animals still hold their body heat. An overcast previous night or ground soaked by rain narrows the contrast and makes the images harder to read.
Can counting be fully automated, without a human review? Not yet reliably for everyday use: automated counting algorithms, including the ones studied by France's livestock institute, are promising but still in development. Today an operator always reviews the images to confirm the total.
Does this work on mountain summer pastures? Yes, with extra care around protected areas and the terrain's own altitude, which quickly brings the drone close to the 120 m ceiling above ground. Our guide to drones in the mountains and national parks covers the restrictions specific to those areas.
Put it into practice
- Drone aerial thermal imaging: rates and cities covered from €500
- Drone security & surveillance: rates and cities covered from €600
- Aerial thermal imaging in La Seyne-sur-Mer Provence-Alpes-Côte d'Azur
- Aerial thermal imaging in Niort Nouvelle-Aquitaine
- Aerial thermal imaging in Vannes Bretagne