Common Buzzard

The buzzard is a bird easily recognized by its silhouette, difficult by its color. A stocky body, broad wings rounded at the ends, a short rounded tail, and a massive head — these are constant features. Color — from a light cream form with a white underside to almost black individuals — is so variable that among the Polish population, there are practically no two identical birds.

Body length 51–57 cm, wingspan 110–130 cm, weight 525–1364 g. Sexual dimorphism is distinct but less dramatic than in the sparrowhawk: the female is 10–25% heavier than the male, but in the field, the differences are subtle. The most certain way to distinguish them is by observing a pair — the significantly larger one is the female.

The buzzard's color polymorphism is a phenomenon among Polish birds of prey. Three main color types are distinguished: (1) dark form — uniformly dark brown, almost black, with minimal barring; (2) intermediate form — most common, brown back, light band on the breast (the so-called 'necklace'), barred belly; (3) light form — white-cream underside with minimal barring, light head. All three forms occur in the same area, sometimes even in the same pair. Juvenile buzzards have more distinct longitudinal streaking (instead of the transverse barring of adults) and yellowish (not dark brown) irises.

In flight, the buzzard is characteristic: broad wings held in a slight V (dihedral angle — a helpful diagnostic feature), short tail spread like a fan, massive head set into the silhouette. From under the wing, typical dark tips of the primary feathers and often a dark carpal patch — a round spot at the base of the flight feathers — are visible. This pattern occurs in most color forms and is an important identification clue when observed against the sky.

• Stocky body, broad rounded wings, short tail — constant proportions
• Wings in a slight V (dihedral angle) in soaring flight — diagnostic
• Extreme color variability — from light form to almost black
• 'Necklace' on the breast — light band in the intermediate form (most common)
• Dark wingtips and carpal patches — visible against the light
• Female larger by 10–25% — difference is subtle, best seen in a pair
• Juveniles with longitudinal streaking and yellowish iris
• Iris dark brown in adults, yellowish in juveniles

The buzzard is a landscape mosaic species — it needs forest for nesting and open space for hunting, ideally at the boundary of both. This universal niche explains why it is the most numerous European bird of prey and why it inhabits almost all of Poland, except for dense urban areas and high mountain peaks.

The optimal habitat for the buzzard is a mosaic landscape: small forest complexes (mixed or deciduous forests) interspersed with meadows, cultivated fields, fallow lands, field boundaries, and woodlots. The key is the availability of open space with a rodent population within a radius of 1–2 km from the nesting site. The buzzard avoids uniform dense old-growth forests (where the goshawk dominates) and completely open areas without trees (where harriers appear).

Its range in PL covers practically the entire country: from the Baltic to the Bieszczady, from Masuria to the Sudetes. The highest densities are in agricultural landscapes with a forest mosaic: Masuria, Greater Poland, Lublin region, Podkarpacie. Lower in dense primeval forests (Białowieża, Augustów — the buzzard is there, but rarer than in the adjacent cultural landscape). Expansion into roads and highways is a phenomenon of the last 20 years — highway roadsides offer unprecedented rodent density in tall grass and a regular supply of carrion (animals killed by cars). A buzzard on a pole by the A2 highway is today the most common sight of a bird of prey in the Polish landscape.

Migrations: most Polish buzzards are resident or short-distance migrants. In winter, individuals from Scandinavia, the Baltic countries, and Russia arrive in PL — including the subspecies vulpinus (Steppe Buzzard, often rusty). The autumn migration peaks in mid-October, spring in mid-March. Flights are spectacular — concentrations of hundreds of buzzards at migration bottlenecks (Vistula Spit, Low Beskids). In winter, birds are primarily observed in open fields with remains of beets or corn, where rodents are most numerous.

• Mosaic landscape — forest/field boundary, the best habitat
• Mixed and deciduous forests — nesting on old trees
• Meadows, fallows, boundaries, stubble — hunting grounds for rodents
• Highways and road verges — expansion of the last 20 years
• Open areas with single trees and poles — observation points
• Avoids: dense old-growth forests (goshawk), urban areas, high mountains

The buzzard's diet is clearly optimized for field rodents — 60–70% of the prey biomass consists of voles and mice. The rest is opportunism: carrion, earthworms, birds, reptiles, insects. This dietary flexibility, along with a well-developed bone-digesting apparatus, explains the ecological success of the species.

The prey spectrum in Polish studies: common vole (Microtus arvalis) — a key species, locally up to 80% of the diet in peak years; tundra vole, striped field mouse, wood mouse; less frequently bank vole, shrews, moles. The second most important component is carrion (15% of biomass) — the buzzard is one of the few Polish predators that regularly and without hesitation uses carrion: animals killed on roads (roe deer, foxes, hedgehogs, cats), dead farm animals, winter frost victims. Earthworms (10%) — key in summer after rain, when the buzzard walks on freshly plowed fields almost like a stork. Birds account for 5–10% of the diet: corvid chicks, young starlings, partridges, sometimes weak or injured individuals of larger species. Reptiles: grass snakes, slow worms, lizards — important in the dry meadows of southern PL.

The buzzard's hunting techniques are diverse and situational. (1) Ambush hunting from a pole — the most common, energetically cheapest: the bird sits on a pole, tree, stone, or even a fence and waits patiently for 15–60 minutes, observing the surroundings; after spotting a rodent, it drops in a short glide and catches it. (2) Circling soaring over the field — higher energy expenditure but wider search area, used mainly on warm days with updrafts. (3) 'Hovering' like a kestrel — the buzzard can hang in one spot over a mouse hole, vigorously flapping its wings; a technique used less often but effective in strong winds. (4) Walking on the ground — during hunting for earthworms and insects, characteristic in freshly plowed fields. (5) Searching for carrion visually from a height or by observing other scavengers.

Consumption: small prey (voles, mice) are swallowed whole by the buzzard or eaten on a pole, where it consumes the prey head-first after killing it. Larger prey (carrion, birds) are torn apart on the spot or carried to a safe place — a clump of bushes, a tree branch. After a large meal, the bird stays nearby for several hours, digesting motionlessly on a pole. Pellets (see section 5) contain fur and bones — strongly compacted, cylindrical, 4–7 cm long.

• 60–70% of diet — field rodents (voles, mice)
• 15% — carrion: roadkill, dead livestock, frost victims
• 10% — earthworms: key in summer after rain, freshly plowed fields
• 5–10% — birds: chicks, weak individuals, young starlings
• Sporadically: reptiles, insects, small arboreal mammals
• Ambush hunting from a pole — the most common technique
• Circling soaring and occasional 'hovering' like a kestrel
• Walking on the ground when hunting for earthworms

The buzzard is monogamous and faithful to its territory — pairs often last many years, and the same nest (or several alternative ones in the same territory) is used every year. The strategy is the opposite of the sparrowhawk, which changes nests: for the buzzard, a known location with a good view of hunting grounds is more valuable than concealment.

The breeding season begins in March — pairs perform spectacular courtship displays over the territory: soaring in pairs, diving from a great height with semi-folded wings, 'garlands' — alternating ascents and descents, and mewing calls. These acrobatics serve a territorial function (a signal to neighbors) and a partnership function (strengthening the pair bond). Nest building or renovation takes place in late March and April. A pair regularly has 2–3 alternative nests in the territory, using them rotationally in subsequent years.

The nest is built in an old deciduous tree (most often oak, beech, pine, spruce) at a height of 10–20 m above the ground, in a fork close to the trunk. The construction is massive, made of thick branches (diameter up to 1 m, weight up to 100 kg after years of additions), lined with leaves, moss, and hay. A nest used for many years grows — annual additions create a characteristic platform visible in winter without leaves. Location: usually at the edge of the forest or in a small field woodlot, with a good view of the surrounding fields — the buzzard likes to see hunting grounds from the nest.

The clutch consists of 2–4 eggs (most often 3), white-blue with brown spots. Laying occurs at intervals of 2–3 days, from April to May. Incubation lasts 33–35 days, carried out mainly by the female; the male provides food. Chicks are born blind, covered with white down. They open their eyes on the 5th day and leave the nest (first flights) at 50–55 days of age. After leaving the nest, the young stay in the parents' territory for 4–8 weeks, learning to hunt. Full independence: at the turn of August and September. Breeding success in PL varies annually from 1.8 to 2.5 young per pair — years of vole gradation are years of high success, while years of rodent population collapse mean low breeding success.

Among Polish birds of prey, the buzzard is one of the easiest to track. It spends a lot of time motionless on poles and trees, where it systematically leaves pellets, droppings, and feathers. Under the nest, mutes accumulate — diagnostic, extensive splashes visible even in winter without leaves.

The buzzard's pellets are characteristic and often found: cylindrical, 4–7 cm long, 2–3 cm diameter, dark gray or gray-brown, strongly compacted, containing rodent fur and small bones. Unlike owl pellets, the buzzard partially digests bones — the pellet contains fewer large bone fragments than a tawny owl pellet, but more than a sparrowhawk's. Location: under favorite observation points — poles, lone trees, village roadside crosses. Pellets on one pole often lie in groups of a dozen or so from different days — diagnostic that it's a regular lookout.

Mutes — these are white splashes of droppings under the nesting site or under permanent observation points. Under a buzzard's nest, the mute area is extensive (radius of 3–5 m around the tree), with white splashes on the ground, fallen leaves, and low shrubs. Diagnostic during the May–August period when the chicks are in the nest and regularly eject droppings over the edge. Practical tip: a mute area under an old oak at the edge of the forest = with high probability, a buzzard nest high in the canopy.

Tracks in snow and mud: the buzzard walks on the ground while hunting for earthworms — it leaves characteristic paw prints: four toes, 7–9 cm long, 6–8 cm wide, with clear impressions of claws and knuckles. The step is short (10–15 cm) and single (it does not hop, like a crow). In the snow in the fields after hunting, struggle sites with prey remain: trampled snow, feathers, sometimes wing marks ('wing-drag' — imprint of wing feathers on the snow after landing). Buzzard feathers are often found on poles and under trees — broad, barred flight feathers 25–35 cm long, the characteristic last element being a dark tip.

• Pellets — cylindrical 4–7 cm, fur + small bones
• Mutes — extensive white splashes under the nest (3–5 m radius)
• Paw prints on the ground — 4 toes, 7–9 cm length, claw marks
• 'Wing-drag' in snow after landing — imprint of flight feathers
• Flight feathers 25–35 cm with a characteristic dark terminal band
• Prey remains under a favorite pole/tree
• Contact call — long mewing 'hi-jaaaa' (Feb–Aug)

The buzzard is the most frequently observed Polish bird of prey in the field — and one of the few that have benefited from the development of civilization. Open agricultural landscapes, power line networks, highways with poles and verges, and a regular supply of carrion — all this has created more favorable conditions for it than the native steppe-forest mosaics of 200 years ago.

Highway roadsides are today the primary context for observing buzzards in PL. Every driver on the A1, A2, A4, or S8 sees a dark silhouette controlling the grass on poles every few kilometers. Statistics: on 100 km of highway during the growing season, there are an average of 8–15 hunting buzzards, each occupying a several-kilometer stretch of the roadside. The highway zone is a modern ecological niche for the species — easy food, no competition, low predator pressure on nests (buzzards nest in the forests near the highways).

Cooperation with the farmer: the buzzard is the most important biological controller of rodent populations in Polish agriculture. A pair of buzzards consumes 2000–3000 voles and mice annually — the equivalent of several hundred kilograms of potential yield losses. Polish agri-environmental programs encourage leaving old nesting trees and buzzard perches (poles on field boundaries) to increase hunting efficiency. Pesticides and the buzzard: 2nd generation rodenticides (brodifacoum, bromadiolone) are a serious threat — they accumulate in the livers of prey rodents, causing internal bleeding in buzzards. Polish veterinary supervisors find dozens of poisoned individuals annually.

Conflicts with poultry farming are rare but recorded. The buzzard does not regularly attack adult hens (they are too large), but there are occasional kidnappings of chicks from village runs. Statistics: in PL, 1–3% of farms raising free-range poultry report losses annually, averaging 2–5 chicks per season. Illegal killing — in some regions of PL, the buzzard is still a target of illegal shooting (despite strict protection) — especially in regions with a strong tradition of raising chickens and pigeons. Poisoning with carrion containing carbofuran (a substance banned in the EU since 2008) is recorded. Falconry: the buzzard is a popular species in Polish falconry — hundreds of individuals are legally kept in breeding facilities, used mainly for demonstrations, less often for hunting.

• The most frequently observed bird of prey along Polish roads
• Controller of rodent populations — a pair eats 2000–3000 voles a year
• Expansion into highway niches — a phenomenon of the last 20 years
• 2nd generation rodenticides — a key civilization threat
• Collisions with power lines and cars — a common cause of mortality
• Illegal killing in some regions — shootings, poisoned carrion
• Conflicts with poultry farming rare and localized (1–3% of farms)
• Falconry — legal breeding with a license, popular demonstration species

The buzzard is fully covered by strict species protection in Poland — since 1981. After decades of persecution in the 19th and first half of the 20th century (considered a 'hunting pest'), the population is stabilizing at 60–80 thousand breeding pairs — the highest in 100 years. This is a conservation success, but civilization threats remain real.

Legal status: strict protection in Poland (Regulation of the Minister of the Environment of December 16, 2016, on the protection of animal species, Annex 1 — species under strict protection); EU — Annex I of the Birds Directive (species subject to special conservation measures in Natura 2000 areas); CITES — Appendix II (trade regulation); Berne Convention — Appendix II (strictly protected species). Absolute prohibitions: killing, disturbing, destroying nests, possessing dead birds, photographing at the nest without permission. Zonal protection is not mandatory for the buzzard, but recommended in Natura 2000 areas with a dense population (a zone of 100–200 m around the nest during the period March–August).

Main threats: (1) 2nd generation rodenticide poisoning (brodifacoum, bromadiolone, difenacoum) — they accumulate in the livers of prey rodents, causing internal bleeding in buzzards; an estimated 2–4% of annual population mortality; (2) Collisions with power lines and cars — highest mortality in inexperienced first-year young birds; (3) Illegal killing — shootings, poisoned carrion with carbofuran (a banned substance, but used illegally); (4) Felling of old nesting trees in forest management — the buzzard needs trees with a diameter at breast height of 50–80 cm; (5) Fragmentation of the agricultural landscape — field homogenization, removal of field boundaries and woodlots reduces the number of lookout points and the rodent population.

Conservation actions: (1) Leaving old trees in production forests as biocoenotic trees (State Forests); (2) Maintenance of field woodlots and boundaries in agri-environmental programs; (3) Educating farmers about the benefits of the buzzard as a rodent controller; (4) Population monitoring as part of the Common Breeding Bird Monitoring (MPPL); (5) Rehabilitation centers for injured individuals — there are over a dozen centers in PL accepting birds of prey. Long-term trend: stable or slightly increasing — the buzzard is one of the few European birds of prey that shows no decline in numbers.

• Strict protection in PL since 1981; EU Annex I of the Birds Directive
• CITES Appendix II; Berne Convention Appendix II
• Rodenticide poisoning — 2–4% of annual population mortality
• Collisions with lines and cars — especially in young birds
• Illegal killing — shootings, poisoned carrion (carbofuran)
• Felling of old-growth trees — loss of nesting trees
• Leaving biocoenotic trees — key conservation action
• Stable trend, population 60–80 thousand pairs — conservation success

Even though the buzzard is the most common bird of prey in PL, its field identification is regularly confused. Three key species it is mistaken for: Honey Buzzard (almost identical size and color), Red Kite (silhouette in flight), Goshawk (in poor light). The buzzard's extreme color variability further complicates the matter — dark forms are mistaken for crow-like soarers, light ones for harriers.

The most common mistake — with the honey buzzard (Pernis apivorus). The honey buzzard is a summer visitor, in PL from May to September, ecologically specialized in the nests of wasps, bumblebees, and hornets. From a distance of 200 m or more, it is practically indistinguishable from the common buzzard — the same size (52–60 cm), the same general color pattern (variable, brown-white). Diagnostics: (1) head — the honey buzzard has a smaller, narrower head with a longer neck than the common buzzard (comparison with a wood pigeon vs. a jay); (2) tail — the honey buzzard has a longer tail with 2–3 distinct dark bands; (3) wings — the honey buzzard holds them horizontally or slightly lowered in soaring flight (common buzzard in a slight V); (4) belly — the honey buzzard often has transverse bars (common buzzard rather longitudinal streaks).

With the red kite (Milvus milvus), the buzzard is mistaken mainly from a distance or in silhouette against the sky. Key difference: the kite has a distinctly forked tail in the shape of a V (the buzzard has a rounded tail, straight at the end). The kite is also distinctly slenderer, has longer and narrower wings, and characteristic white 'windows' under the wings at the base of the primary feathers. The kite's color is uniformly rusty-orange — the buzzard rarely achieves such a tone. With the goshawk, the buzzard is mistaken in poor light or when the bird sits motionlessly. Diagnostics: the goshawk is slenderer, longer, has a long tail and narrower, longer wings; the buzzard is stocky with a short tail and broad wings. The goshawk in flight performs long glides with powerful wingbeats, the buzzard calmly circles in thermal currents.

• Stocky silhouette, broad wings in V, short tail — common buzzard
• Small head and longer tail with bands — honey buzzard (May to Sept)
• Forked V-shaped tail — red kite, never a buzzard
• Slender build and long tail — goshawk or sparrowhawk, not a buzzard
• Mewing call — common buzzard, but beware: wood pigeon sounds similar
• Pole by the road + large dark bird in winter — 90% a common buzzard