Common Kestrel
Falco tinnunculus
The Old World's most familiar falcon — a wind-hovering specialist found across Europe, Asia, and Africa. Known in Japanese as チョウゲンボウ (Chōgenbō), it offers an accessible entry into falconry outside North America.
The Wind Hover
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The Common Kestrel has a long history in Old World falconry, though it has rarely been considered a prestigious species. Medieval European falconry manuals assigned the kestrel to the lowest social rank — knaves and servants — reflecting the bird's small size and humble quarry rather than any lack of capability. Despite this low status, kestrel falconry persisted among common people who lacked access to the Goshawks and Peregrines reserved for nobility. In Japan, the Common Kestrel (Chōgenbō) has been used in traditional falconry to a limited extent, primarily as a training bird for young or aspiring falconers before they graduated to larger species. This training role has given the Common Kestrel an enduring place in global falconry culture.
Common Kestrel vs. American Kestrel
Falconers familiar with the American Kestrel often ask how it compares to the Common Kestrel. While both are small falcons, they differ in several important ways:
- Size: Common Kestrels are noticeably larger and heavier, with females reaching 9 oz compared to the American Kestrel's 5 oz. This extra mass provides a wider weight management window and slightly more forgiveness of feeding errors.
- Hunting style: Common Kestrels are primarily rodent hunters that rely on hovering and pouncing, while American Kestrels take a wider variety of prey including insects and small birds. This affects the type of quarry and habitat you will hunt.
- Temperament: Common Kestrels are generally considered calmer and less flighty than American Kestrels. They tend to settle more quickly on the fist and tolerate handling with less frequent bating, making the manning process somewhat smoother.
- Primary quarry: Common Kestrels in falconry are typically flown at voles, mice, and shrews, with occasional small bird or large insect quarry. American Kestrels are more commonly flown at sparrows and insects. The Common Kestrel's rodent focus means you need access to suitable grassland or agricultural habitat.
Hunting Style
Common Kestrels bring their natural hovering instinct into falconry, creating a distinctive hunting experience:
- Voles and mice The primary quarry for falconry Common Kestrels, hunted over grassland, stubble fields, and rough pasture
- Shrews Small but abundant prey taken opportunistically, especially in rough grassland habitats
- Large insects Grasshoppers, beetles, and other large invertebrates, particularly useful during training and conditioning
- Small birds Occasionally taken, especially by experienced females, though this is not the species' primary strength
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Weight Management
Weight management for Common Kestrels is more forgiving than for American Kestrels, but still demands careful attention:
- Wider margins than American Kestrels: At 5-9 ounces, Common Kestrels have a usable weight window of roughly 8-12 grams — still narrow by buteo standards, but meaningfully wider than the 5-8 gram window typical of American Kestrels.
- Daily weighing essential: As with all small raptors, daily gram-scale weigh-ins are non-negotiable. Track weight trends over several days rather than reacting to single readings.
- Seasonal adjustment: Common Kestrels handle cool weather better than American Kestrels due to their larger body mass, but extended cold snaps still require increased food rations and attention to overnight weight loss.
Is a Common Kestrel Right for You?
Consider a Common Kestrel If:
- You are a beginning or intermediate falconer outside North America looking for an accessible first falcon
- You have access to grassland, agricultural fields, or rough pasture with healthy vole populations
- You want to learn falcon handling and weight management fundamentals with a relatively forgiving species
- You have limited space and cannot house a larger raptor
- You are interested in the unique spectacle of hover-hunting falconry
Look Elsewhere If:
- You are primarily interested in hunting birds rather than rodents
- You want the prestige and challenge of a larger falcon species
- You live in North America, where the American Kestrel fills a similar ecological role
- You lack access to suitable open-ground hunting habitat with rodent prey
- You are looking for a species that can take larger, more substantial quarry
Field Identification
Common Kestrels are small Old World falcons with the slender build and pointed wings typical of the genus, measuring roughly 32 to 39 centimeters in length with a wingspan of 65 to 80 centimeters. They show pronounced sexual dimorphism: males display a blue-grey head and tail with a rufous-brown back marked by dark spotting, while females are uniformly rufous-brown with darker barring across the back, wings, and tail. The most distinctive field mark is behavioral rather than visual — the species’ characteristic wind-hover, in which the bird faces into the wind and beats its wings in place to scan for small mammals below. In Europe, Common Kestrels are most often confused with Lesser Kestrels (smaller, more pointed wings, gregarious habits) or the Eurasian Hobby (darker, faster wingbeats, prefers aerial insect prey).
Conservation Status
Common Kestrels are classified as Least Concern by the IUCN, with a vast global range across Europe, Asia, and Africa. Despite this status, populations have declined significantly in parts of Western Europe over recent decades due to agricultural intensification reducing vole populations, pesticide use, and the loss of nest sites in modernized farm buildings. The UK’s British Trust for Ornithology places the species on its Amber List for these regional declines. The species is highly adaptable to urban environments, frequently nesting on buildings and hunting along motorway verges and city parks where rodents thrive in ungrazed grass strips. Because Common Kestrels often hunt at the road edge, vehicle collisions are a significant cause of mortality and a recurring topic in conservation monitoring.
Historical Use
In medieval European falconry, the kestrel occupied the lowest tier of the Boke of St Albans hierarchy — the bird assigned to the knave or servant rather than the king or earl. This classification reflected its small size and the limited quarry it could take, not any deficiency in falconry skill required to fly one. Today the Common Kestrel remains a respected training species for newer falconers because it offers an honest introduction to weight management, manning, and the patience required for any raptor work, all without the speed and intensity of a larger falcon. Its hunting style is distinctive rather than versatile: kestrels excel at small mammal predation and large insects but rarely take birds. The species also enjoys an outsized place in cultural memory thanks to Barry Hines’ novel Kes and T. H. White’s falconry writings, both of which framed the kestrel as the working person’s falconry bird.