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Eurasian Hobby | Falco subbuteo
Boomvalk | Alcotán europeo
The Eurasian Hobby is the Old World counterpart of the Australian Hobby and does not belong in this region: it breeds from western Europe to eastern Asia and winters in Africa and southern Asia, and only the odd lost bird has ever reached Australia. Identification here is therefore not about the genus but about one question: are this small, scythe-winged falcon's underparts really clean white?
Voice
In this region the Eurasian Hobby is almost always silent — a lone vagrant far outside its breeding range has nobody to call to. On the Eurasian breeding grounds it gives a sharp, high, rapidly repeated series at the nest, kew-kew-kew-kew, more piercing and clearer than the chatter of the Australian Hobby, along with a softer, plaintive wee-chup at food passes. Do not count on voice to settle a bird here.
No freely licensed recording has been found for this species yet; what to listen for is described below.
Identification
A slim, small falcon of around thirty centimetres with long, pointed, scythe-shaped wings and a short, square-cut tail: in outline a big swift. The upperparts are slate-grey with a dark crown and two narrow black moustaches, against which a white throat and a white cheek patch stand out sharply. The underparts are bright white to cream with dense, crisply drawn black streaks, and below them thighs and vent are rufous-red — in the adult a sharply bounded, conspicuous panel. Juveniles are browner above, lack the red, and have a buff-tinged underside.
Confusion species
Australian Hobby (Falco longipennis) is the only real confusion species and is the default bird here: it has warm rufous to buff underparts with no white contrast, a pale nape collar that shows as a light patch, and no cleanly defined white cheek patch. Every 'hobby' in Australia is therefore an Australian Hobby until photographs prove otherwise. Peregrine Falcon (Falco peregrinus) is far bulkier, barred rather than streaked below, with a full black helmet. Nankeen Kestrel (Falco cenchroides) is rufous above and hovers.
Habitat
On its breeding grounds this is a bird of open country with copses and woodland edges, often by lakes, rivers and marshes, where it hunts swallows, swifts and dragonflies over the water. The few birds that have reached this region were in comparable ground: open, partly built-up country around a freshwater lake on the edge of a city, with plenty of hirundines in the air.
Where the bird is most often found, arranged by main group and formation.
Range and movements
Within the map window of this guide the Eurasian Hobby is an extremely rare vagrant with a single accepted record on the Australian mainland: an adult at South Lake, on the southern edge of Perth in Western Australia, on 6 February 2016. Beyond that there are two accepted records from the Cocos (Keeling) Islands (2010 and 2014) and some unaccepted reports from Christmas Island and the Cocos group. New Zealand and Norfolk Island have no accepted records. It does not breed here: the birds that turn up are northern breeders that have overshot on southward migration.
- Breeding (summer)
- dark = core range, pale = thinly spread
Where and when to look
The odds are slim but the way in is clear: check the underparts and face of every 'Australian Hobby' during the austral summer. White with crisp black streaks and an obvious white cheek patch against a dark hood — rather than plain rufous — is the cue to reach for the camera. Always photograph it, because an Australian rarities committee will not accept such a record on description alone.
Conservation
Least Concern (LC): the species has an enormous breeding range from the Atlantic coast to Kamchatka and a world population in the hundreds of thousands. Pesticides, the loss of crow nests as tree lines are cleared, and persecution along migration routes press locally, but there is no global decline. For Australia and New Zealand the species carries no conservation task — it scarcely occurs there.
Scientific name
Falco subbuteo | Linnaeus, 1758
Linnaeus described the species in 1758 as Falco Subbuteo; the genus has not changed since, so author and year carry no parentheses. Falco is Latin for 'falcon'; subbuteo combines sub-, 'nearly, below', with buteo, 'buzzard' — a name from the old falconry literature that ranks the smaller falcon below the buzzards. The type locality is Europe, restricted to Sweden by Linnaeus himself in the Fauna Svecica of 1761. The Dutch name 'boomvalk', tree falcon, refers to its breeding in old crow nests high in trees.