Insects Active during the day

Blood-red Field Ant

Formica sanguinea

iNaturalist Wikipedia

The Blood-red Field Ant is a bold and strategic master of the undergrowth, famous for its red-and-black armor and its unique habit of raiding neighbor colonies. These fascinating insects are the perfect subjects for backyard macro-photography, offering a glimpse into a complex world of insect warfare and cooperation.

0 Sightings

0 Habitats

Quick Identification

straighten

Size

Workers range from 5–9 mm (0.2–0.35 in); Queens are slightly larger, reaching up to 10–11 mm (0.43 in).

palette

Colors

Striking bicolored body with a vibrant blood-red or rust-red head and thorax, contrasting sharply with a dark black or deep charcoal abdomen (gaster).

visibility

Key Features

Distinctive blood-red head and thorax with a black gaster
Notched clypeus (front of the head) visible under macro lens
Aggressive behavior when disturbed, often spraying formic acid
Commonly seen trailing in 'raid' lines toward other ant nests

When You’ll See Them

schedule

Activity pattern Active during the day

brightness_5

Peak hours 10 AM – 4 PM

calendar_month

Season May–September

restaurant

Diet Generalist foragers that eat insects, spiders, and carrion, supplemented heavily by 'milking' aphids for sugary honeydew.

park

Habitat Open woodlands, forest edges, sunny embankments, and well-drained suburban gardens.

public Geographic range

Where Does the Blood-red Field Ant Live?

Native to the vast Palearctic realm, the Blood-red Field Ant enjoys a massive geographic footprint that stretches from the United Kingdom and Northern Europe across the Russian plains to Japan and the Korean Peninsula. While it is a staple of Eurasian temperate forests, it is also found in parts of North Africa and throughout the United States and Canada. These ants are particularly fond of 'edge' habitats where sunshine can reach the ground, making them a common sight in both wild heathlands and established suburban neighborhoods.

Basemap © OpenStreetMap contributors

10 Countries

55M km² Range

Least Concern Conservation

Russia CN China GB United Kingdom DE Germany US United States CA Canada JP Japan South Korea FR France PL Poland

Elevation range

0 m1,000 m2,000 m4,000 m

Sea level – 2,400 m

eco

iNaturalist / Verified observation data

View on iNaturalist open_in_new

Explore more Insects arrow_forward

Behavior

The Blood-red Field Ant is famous in the insect world for its 'facultative slave-making' behavior. While these ants are perfectly capable of maintaining a colony on their own, they frequently launch organized raids on the nests of other Formica species, such as the Common Black Ant. During these raids, they steal the pupae and bring them back to their own nest. When the stolen ants hatch, they instinctively perform worker duties for the Blood-red colony, unaware they are in a different nest.

Beyond their raiding tactics, these ants are highly territorial and active hunters. They are known for their 'acid-spraying' defense; when threatened, they tuck their abdomen forward and spray formic acid at intruders. They are sun-lovers and are most active during the warmest parts of the day, often seen scurrying across garden paths or through leaf litter in search of food or conquest.

In a backyard setting, they are beneficial as they prey on various garden pests. Unlike some invasive ant species, they generally do not enter homes unless there is a significant food source near an entrance. They form large, complex underground nests, often topped with small mounds of soil or debris located near rocks or rotting wood that help regulate the nest's temperature.

photo_camera EverydayEarth exclusive

Camera Tips

To capture the Blood-red Field Ant on camera, you need to think small and focus on high-traffic areas. Look for their nests near sun-exposed wood or stones. Because these ants are highly active during the day, position your camera in a spot that receives dappled sunlight. Since they are small, a macro lens or a camera with a very close focal point is essential. Place the camera at ground level, ideally using a small tripod or a beanbag for stability, and angle it slightly upward to capture their profile against the sky or foliage.

Baiting is the most effective way to bring them into the frame. A small dab of honey, jam, or a piece of overripe fruit placed on a flat stone will attract workers within minutes. If you want to see their predatory side, a small piece of protein like a bit of tuna or a dead cricket can trigger a group foraging response, which makes for excellent time-lapse or high-frame-rate video. Keep the bait in a consistent spot for a few days to 'train' the ants to visit that specific stage for your camera.

Lighting is your biggest challenge and your best friend. Direct midday sun can wash out their vibrant red colors, so try to use a white card or a piece of parchment paper to diffuse the light if you are doing a controlled setup. If your camera allows for manual focus, pre-focus on the bait or a specific point on an ant trail. Because these ants move quickly, using a high shutter speed is necessary to freeze the motion and see the fine details of their antennae and legs.

Similar Species

Species that look similar or are commonly confused with Blood-red Field Ant.

Southern Wood Ant

Builds massive mounds of pine needles and lacks the notched clypeus found in the Blood-red Field Ant.

Browse all Insects arrow_forward

Frequently Asked Questions

These ants are strictly diurnal and love the heat. They are most active during the sunniest parts of the day, typically from late morning through mid-afternoon, when the ground temperature allows them to move at peak speed.

You can attract them by providing sun-exposed foraging areas and 'soft' landscaping like logs and stones. To see them on camera, use sweet baits like honey or sugar water, or protein baits like small bits of cooked meat.

They are omnivores. They hunt smaller insects and spiders, scavenge on dead animals, and spend a significant amount of time tending to aphids to collect honeydew, which provides them with essential sugars.

Yes, they are very common in suburban gardens that have plenty of sunlight and 'edge' environments. They prefer gardens with some wilder patches where they can find nesting materials and aphid-rich plants.

While both are red and black, the Blood-red Field Ant has a distinctive 'notch' in the middle of its clypeus (the front of the head above the mandibles) which Wood Ants lack. They also tend to build smaller, less conspicuous nests compared to the large pine-needle mounds of Wood Ants.

Record Blood-red Field Ant at your habitat

Connect a camera to start building your own species record — AI identifies every visitor automatically.

Join free Identify a photo