European Roller vs Abyssinian Roller

In short

The most reliable field mark to separate European Roller from Abyssinian Roller is the presence of long, trailing tail streamers in adult Abyssinian Roller, which are absent in European Roller of any age. Both species are mainly blue with a warm brown back, but the Abyssinian Roller’s tail streamers and slightly smaller, more elongated shape are distinctive, especially in flight. Juveniles of both species are drabber, but the tail streamer difference remains key. In perched birds, look for the proportion of brown on the back and the tail shape. Both species can show strong blue contrasts in flight, but the Abyssinian’s tail streamers and more extensive blue on the wings are diagnostic.

Identification tips

1. Tail streamers (adults): Abyssinian Roller adults have long, pointed tail streamers (about 12 cm) that trail behind in flight and are visible when perched. European Roller never shows tail streamers at any age.
2. Tail shape (all ages): European Roller has a squarer, shorter tail, while Abyssinian Roller’s tail is more elongated due to the streamers. This is most obvious in flight but can be seen when perched if the tail is not obscured.
3. Upperwing pattern (adults): Both species show brilliant blue wings in flight, but European Roller has blue-black tips to the flight feathers, which can be seen in good light. Abyssinian Roller’s wings are more uniformly blue without such a marked black tip.
4. Back color: Both have a warm brown back, but this is more extensive and richer in European Roller. In Abyssinian Roller, the brown is present but may appear less contrasting due to the more extensive blue elsewhere.
5. Body shape: European Roller is stockier and more robust, while Abyssinian Roller appears more slender and elongated, especially with the tail streamers.
6. Perched posture: Both perch upright on exposed branches or wires, but the Abyssinian’s tail streamers often hang below the perch, making it look longer-tailed.
7. Juvenile plumage: Juveniles of both species are duller and less contrasting, but the tail streamer difference remains the best separator as soon as the Abyssinian reaches adult plumage.
8. Flight jizz: Both species have strong, direct flight and perform acrobatic display flights. The Abyssinian’s tail streamers flutter and trail during flight displays, while European Roller’s flight is more compact and lacks trailing streamers.
9. Voice: Both give harsh, crow-like calls, which are not reliably separable in the field unless you are highly experienced with both species.
10. Range and context: In Europe and the Maghreb, only European Roller is present. In the Sahel and tropical Africa, Abyssinian Roller predominates. In sub-Saharan Africa during the northern winter, both may occur, so rely on tail shape and structure.
11. Sex differences: Both species are sexually monomorphic in plumage, so do not use sex as a separator.
12. Seasonal variation: European Roller is a long-distance migrant, absent from Europe in winter; Abyssinian Roller is resident or a short-distance migrant within Africa.
13. Subspecies: European Roller subspecies differences are subtle and not likely to cause confusion with Abyssinian Roller.
14. Habitat: Both use open country with scattered trees, so do not rely on habitat alone where ranges overlap.
15. Common pitfalls: Do not rely solely on blue coloration or brown back, as both species share these features. Focus on tail shape and length, especially in flight or when perched with the tail visible.

Size

Both species are similar in overall size, with European Roller measuring 29–32 cm in length and Abyssinian Roller at 28–30 cm. However, the Abyssinian Roller appears longer-tailed due to its 12 cm tail streamers in adults, giving it a more elongated look in flight and when perched. Wingspans are not directly compared, but both are in the range of a Eurasian Jay or Jackdaw. In the field, size alone is not a reliable separator, but the tail streamers of the Abyssinian Roller make it appear longer and more slender in silhouette.

Plumage

Juveniles of both species are duller versions of adults, lacking the full intensity of blue and brown, but the tail streamer difference is present from the first adult plumage in Abyssinian Roller. European Roller shows a mainly blue body with a rich orange-brown back and blue-black wingtips in flight. Abyssinian Roller also has a brown back but is otherwise blue, with adults showing long, pointed tail streamers that are absent in European Roller. In flight, both species are strikingly blue, but the Abyssinian’s tail streamers trail noticeably behind, and its blue may be more extensive on the wings. The European Roller’s blue-black flight feather tips can be seen in strong light. Sexes are similar in both species, so sex is not a useful separator. Subspecies variation in European Roller (C. g. semenowi) is subtle and not likely to cause confusion in the field.

Behaviour

Both species perch prominently on exposed branches, wires, or posts, scanning for prey and often sallying out in strong, direct flight. Both perform acrobatic display flights with twists and turns. Abyssinian Roller is noted for being especially bold, sometimes diving at intruders, and may be seen dashing into smoke for insects. European Roller’s display is more aerial, with rolling and twisting flight, which is the origin of its English name. Both species can appear shrike-like in their upright posture, but the Abyssinian’s tail streamers are often visible even when perched.

Habitat

European Roller breeds in open, warm lowland areas with scattered trees across southern and eastern Europe, West Asia, and North Africa, wintering in dry wooded savanna and bushy plains of sub-Saharan Africa. Abyssinian Roller is resident or a short-distance migrant across the Sahel and tropical Africa south of the Sahara, favoring open country with trees. In areas of winter overlap (sub-Saharan Africa), context is less helpful, but in Europe and the Maghreb, only European Roller is expected. Both species use similar open habitats with scattered trees, so habitat is not a strong separator where ranges overlap.

Voice

Both species give harsh, crow-like calls. European Roller’s call is described as a raucous, crow-like sound, especially when alarmed. Abyssinian Roller gives a harsh 'gak' or screeched 'aaaargh.' In practice, their calls are similar and not a reliable separator unless you are very familiar with both.