Do Burrowing Owls Migrate? A Look at Their Seasonal Movements

Whether a burrowing owl migrates depends almost entirely on where it lives. Northern populations of the western subspecies leave their breeding grounds each fall and fly south, sometimes covering hundreds of kilometers, while birds in Florida and the warmer edges of the western range stay put year-round. This makes burrowing owls a striking example of partial migration, and recent genetic work has uncovered that the split between movers and stay-at-homes has roots that go beyond simple weather.

Two Subspecies With Different Lifestyles

North America is home to two recognized forms of the burrowing owl. The Florida subspecies, Athene cunicularia floridana, lives only in Florida and is entirely non-migratory. The western subspecies, A. c. hypugaea, has a much larger range stretching from southern Canada down through the Great Plains and western states into Mexico. Within that broad range, the pattern splits again: birds breeding in the northern tier, roughly from southern Canada through the northern Great Plains and the Pacific Northwest, are migratory. Those living in southern California, parts of Texas, and Mexico generally stay on territory all year.¹

The geographic boundary is not a sharp line on a map. In the middle latitudes of the western range, you can find birds that migrate short distances alongside neighbors that stay through the winter. But the overall pattern is clear: the colder and more northern the breeding site, the more likely a burrowing owl is to leave when fall arrives.

Where the Migrants Go

Migratory burrowing owls head south into the southwestern United States and Mexico for the winter. The owls that breed in Idaho, Oregon, and other parts of the northern range have been confirmed as migratory through stable isotope analysis of their feathers, a technique that reveals the general latitude where a bird has been living based on the chemical signature of the water it drank.² Their wintering destinations include agricultural valleys and grasslands across central and northern Mexico.

Research on wintering burrowing owls at sites in the Mexican states of Guanajuato and Jalisco found that the birds establish individual foraging ranges in a mix of irrigated cropland, seasonal crops, and grassland. At one study site near Irapuato, owls consistently incorporated irrigated farmland into their winter territories. At another near Zapopan, most winter ranges were dominated by grassland, though a few owls settled into seasonal cropland or even military infrastructure areas.³ The common thread is open, treeless terrain, the same basic landscape structure the owls seek on their breeding grounds further north.

The extent of this winter range is worth appreciating. Burrowing owls are small raptors, weighing roughly 150 grams, yet the migratory populations routinely cover distances that would be respectable for much larger hawks. This is not a casual shuffle to a slightly warmer valley. It is a genuine long-distance migration compressed into a bird roughly the size of a robin.

Why Some Populations Migrate and Others Do Not

The most straightforward explanation for partial migration in burrowing owls is winter severity. Burrowing owls depend on open ground with short vegetation and accessible burrows, and they eat insects, small mammals, and other prey that become scarce when snow covers the landscape and ground freezes. A burrowing owl in Saskatchewan simply cannot survive a January blizzard the way one in southern Texas can.

But researchers have gone beyond that commonsense explanation and found evidence that the divide has a genetic component as well. A study using genotype-environment association analysis found strong relationships between migratory behavior and environmental conditions linked to cold winter temperatures and barren, open habitats. In the regions of the genome most differentiated between migrants and residents, the researchers found enrichment for genes associated with fat metabolism.⁴ Fat metabolism is central to how birds fuel long flights, so these genetic differences make biological sense. Migrants need to accumulate and burn fat efficiently in a way that residents do not.

This does not mean migration is controlled by a single “migration gene.” The picture is more likely a combination of genetic predisposition and environmental cues. An owl born in Idaho inherits a physiology tuned for fat storage and long-distance travel, but the timing and direction of its migration still respond to local weather and food availability. The genetic evidence just confirms that the migratory and resident lifestyles are not purely learned behaviors or situational responses. They are partly baked into the biology of each population.

How Migration Reshapes Genetic Diversity

One of the most interesting consequences of partial migration is what it does to the genetic structure of different populations. Resident burrowing owls, whether in Florida or in the southern reaches of the western range, tend to stay close to where they hatched. Over generations, this creates genetically distinct local groups. The Florida subspecies showed roughly twice as much genetic differentiation between its populations as migratory western populations did between theirs.¹ California’s resident owls showed a similar pattern of elevated genetic structure compared to the migratory birds further north.

Migratory populations, by contrast, show almost no genetic structure at all. Because migrants from different breeding colonies converge on shared wintering grounds and can end up pairing with mates from distant colonies the following spring, genes get shuffled across huge geographic areas. The result is a genetically well-mixed migratory population where a bird born in Idaho is not particularly distinct, genetically speaking, from one born in Montana or Saskatchewan. Among resident groups, the picture was the opposite: significantly higher genetic differentiation, significant isolation by distance, and substantially more inbreeding.⁴

For conservation, this distinction matters a lot. A migratory population that suffers a die-off at one breeding site can be replenished by immigrants from elsewhere, because the genetic mixing keeps all migratory colonies connected. A resident population that crashes may not recover as easily, because it is genetically isolated and there is no influx of distant birds to refill the gap. Florida’s burrowing owls, separated from the nearest western populations by roughly 1,500 kilometers of unsuitable habitat, are especially vulnerable in this regard.¹

Dispersal Distance Tracks Latitude

Even among the migratory western populations, not all birds move the same distance. A large-scale study using stable isotope signatures to trace the origins of immigrant owls at breeding colonies revealed a strong latitudinal gradient. Northern colonies recruit immigrants from much farther away than southern colonies do. At the northern edge of the range in Canada, around 50°N latitude, half of the immigrant owls arriving at a colony had traveled from origins at least 600 kilometers away. At the southern edge in Mexico, around 25°N, half of the immigrants came from fewer than 90 kilometers away.⁵

The pattern makes intuitive sense. Northern birds are obligate migrants covering long distances, so the pool of potential breeding partners they encounter is drawn from a wide geographic swath. Southern residents stay close to home and tend to settle near where they were raised. The result is a gradient of connectivity: high in the north, low in the south.

One notable exception breaks this tidy pattern. Burrowing owl populations in the agricultural regions of Sinaloa, in northwestern Mexico, recruit immigrants from surprisingly distant northeastern locations, with a median dispersal distance of about 414 kilometers. That is far beyond what the latitude-based model predicts for that region.⁵ Agricultural landscapes may create attractive habitat patches that draw owls from well outside the expected range, disrupting the usual pattern. This is a reminder that human land use can alter natural connectivity in ways that are hard to predict from latitude alone.

Life on the Wintering Grounds

Burrowing owls that spend winter in Mexico’s agricultural valleys face a different set of challenges than they do on their breeding grounds. They are no longer tied to a nest burrow with chicks to feed, so they can range more widely. The wintering birds studied in central Mexico selected habitats opportunistically, with individual foraging ranges that differed from the overall habitat available in the surrounding landscape.³ Some owls gravitated toward irrigated fields, others toward open grassland, and the differences among individuals were substantial. This flexibility is probably an advantage: a species that can winter in both native grassland and converted farmland has more options than one that requires pristine habitat.

That said, agricultural landscapes carry risks. Pesticide use on the irrigated fields where wintering owls hunt can expose them to chemicals that accumulate in their prey. The owls roost in burrows or ground-level shelters on these open landscapes, putting them in direct contact with treated soil and the insects that absorb agricultural chemicals. Winter is also when burrowing owls are least visible to researchers and land managers, which means threats on the wintering grounds can go unnoticed for years before their effects show up as declining breeding populations hundreds of kilometers to the north.

This is one of the fundamental challenges of conserving any migratory species. Protecting nesting habitat in Idaho or Canada does little good if the birds are losing their wintering habitat in Mexico, or if pesticide exposure on the wintering grounds is reducing their survival. Effective conservation has to account for the entire annual cycle, and for burrowing owls, the wintering ecology has historically received much less attention than the breeding season.

How Climate Change Is Complicating the Picture

Climate change is shifting the timing of many bird species’ seasonal behaviors, and burrowing owls are no exception. Warmer springs can cause birds to arrive earlier on their breeding grounds or begin nesting sooner than they did in past decades.⁶ This can create a mismatch between the owls’ breeding schedule and the availability of their primary prey. If the insects and small mammals that owls rely on to feed their chicks peak earlier in the season than they used to, owls that arrive or nest on their traditional schedule may miss the best foraging window.

Warming winters could also shift the geographic boundary where migration becomes necessary. If winters become milder across the northern Great Plains, some populations that currently migrate might find it feasible to stay through the cold months, especially if prey remains accessible and burrows stay unfrozen. Over decades, this could blur the boundary between migratory and resident populations. Given that the migratory and resident lifestyles have distinct genetic underpinnings related to fat metabolism and other traits, a rapid environmental shift could create a situation where owls with migratory physiology are living in a newly temperate environment, or where resident-type owls face occasional severe winters they are not equipped to escape.

The Florida Owls as a Separate Story

Florida’s burrowing owls deserve separate mention because their situation is so different from their western relatives. The Florida subspecies lives in a subtropical environment with no need to migrate. It faces none of the risks of long-distance travel, but it also gets none of the genetic mixing that migration provides. Florida’s owls are genetically distinct, more inbred, and geographically isolated from every other burrowing owl population on the continent.¹

Their habitat challenges are also unique. Rather than grasslands and prairie dog colonies, Florida burrowing owls have adapted to vacant lots, golf courses, airports, and residential lawns. This coexistence with urban development is a double-edged situation. On one hand, the owls have proven surprisingly tolerant of human activity. On the other, they depend on habitat that can vanish overnight when a vacant lot gets developed or a field gets paved. Because Florida’s birds cannot simply move to a nearby migratory population when conditions worsen, local losses are harder to recover from. Each colony that disappears takes a chunk of genetic diversity with it that will not be replaced by immigrant birds from the west.

The contrast between Florida’s isolated residents and the well-connected migratory populations of the western range illustrates one of the central tensions in burrowing owl biology. Migration is costly and dangerous, but it creates population-level resilience through gene flow and demographic rescue. Residency avoids those travel costs, but it concentrates risk. Neither strategy is inherently better; they represent different solutions to different environmental pressures, and each comes with its own conservation headaches.

Practical Identification of Migrants Versus Residents

If you see a burrowing owl in winter, figuring out whether it is a year-round resident or a visiting migrant depends mostly on where you are. A burrowing owl spotted in central Mexico between November and March is very likely a migrant from the northern range. One seen in southern Florida at any time of year is almost certainly a permanent resident. But in the middle of the range, say southern Arizona or parts of Texas, winter sightings could be either. Some of those birds bred locally and never left; others arrived from breeding sites to the north.

Without banding data, satellite tracking, or isotope analysis, there is no way to tell them apart by appearance. Migratory and resident western burrowing owls look identical. Their plumage, size, and behavior overlap completely. Even the Florida subspecies, while sometimes described as slightly smaller and paler, is not reliably distinguishable in the field from a western bird unless you already know you are in Florida. The tools that have proven most useful for tracing migratory connections, stable isotope ratios from feathers and genetic sampling, require capturing the bird, which is obviously not an option for casual observers. For most people watching a burrowing owl bob on a fence post in February, the best clue to whether it migrated is simply the latitude and the calendar.