City Slickers with Wings

The White-winged Dove's Urban Takeover

Once confined to the scrublands of the southern United States, the White-winged Dove is now carving out a new life in our cities, and its breeding secrets are as surprising as they are successful.

Introduction

If you've ever heard a soft, cooing "who-cooks-for-you" echo through a suburban neighborhood or city park, you may have already encountered one of North America's most adaptable birds—the White-winged Dove (Zenaida asiatica). This large, semitropical dove, easily identified by the striking white band on its wings, is undergoing a remarkable ecological transformation.

Range Expansion

Historically found only in southern regions, now breeding as far north as Oklahoma 5 .

Urban Adaptation

Colonizing urban environments with extraordinary adaptability in breeding habits.

Case Study

Offering scientists a fascinating case study in wildlife adaptation to human-altered landscapes.

The Urban Invasion: From Wildlands to Cityscapes

The White-winged Dove's northward expansion represents one of the most significant range shifts observed in North American birds. While its traditional stronghold was the lower Rio Grande Valley of South Texas, the species has capitalized on human population growth in the southern United States.

Increased agriculture and ornamental planting in urban areas have provided additional feeding and nesting habitat, likely facilitating this expansion 5 .

Unlike species that struggle with urbanization, White-winged Doves have demonstrated what scientists call "urban exploiter" characteristics—the ability not just to tolerate but to flourish in human-dominated environments 2 .

A Unique Breeding Strategy

White-winged Doves exhibit a fairly unique breeding strategy among doves: they commonly return to the same breeding area and reproduce in large breeding aggregations, or colonies 4 . This colonial breeding behavior, combined with their adaptability, has enabled them to establish substantial populations in urban areas relatively quickly.

Immigration Pattern

Research using open-population capture-recapture models has revealed that immigration of adults into breeding colonies peaks during late April and early May.

Recruitment Period

In situ recruitment (young produced within the colony) occurs during a concentrated six-week period from mid-June through July 4 .

Breeding Timeline

Late April - Early May

Peak immigration of adults into breeding colonies

Mid-June through July

Concentrated six-week period for in situ recruitment 4

Extended Season

Urban doves have longer breeding seasons compared to rural counterparts 1

Inside the Urban Nursery: Nesting Adaptations

When it comes to raising their young in the city, White-winged Doves have made several key adaptations that distinguish their urban breeding ecology from their rural counterparts.

One of the most significant findings from urban dove research comes from Waco, Texas, where scientists discovered that city-dwelling doves have an extended breeding season compared to their relatives in native brush habitats 1 .

Nesting attempts occurred both before and after the traditional dove breeding period observed in the lower Rio Grande Valley, suggesting that urban environments may provide resources that allow for a longer reproductive window.

Urban White-winged Doves have proven remarkably versatile in their choice of nest sites. Research in Waco documented nests in nine different tree species, demonstrating their ability to utilize whatever vegetation is available in the urban forest 1 .

The study found that nest height—measured as a proportion of total tree height—ranged from 0.31 to 0.75, meaning some nests were placed quite low while others were positioned much higher 1 .

The ultimate measure of breeding success is whether nests successfully produce young, and here urban White-winged Doves show both promising and concerning patterns.

Nesting Attempt Success Rate Key Findings
First Attempt
62%
Highest success rate for urban doves
Second Attempt
24%
Significant decline in success
Overall Success
52%
Combined rate across both years

Data derived from subcutaneous radio transmitter monitoring in Waco, Texas 1

Scientific Spotlight: Tracking Urban Doves

The Methodology

To uncover these breeding secrets, scientists employed innovative tracking techniques. In a landmark study conducted in Waco, Texas, researchers used field-implanted subcutaneous radio transmitters to monitor dove movements and nesting activities 1 . This approach represented a significant advancement in dove research methodology.

Implantation Process:
  1. Capturing doves using baited traps
  2. Surgically implanting small radio transmitters under the skin
  3. Releasing the doves and tracking them every third day
  4. Monitoring transmitter signals until they ceased functioning (typically after 90-120 days)

This technique proved to be a viable method for monitoring nesting activities, allowing researchers to gather detailed data on nesting chronology, success rates, and site selection that would have been difficult to obtain through traditional observation methods alone 1 .

Key Findings

The telemetry study yielded several important insights into urban dove breeding ecology:

Tracking Results

Researchers tracked 26 doves to 36 nests, documenting a maximum of four nesting attempts by individual birds 1 .

Extended Season

The extended breeding season and varied nest height selection emerged as key adaptations to urban living.

Methodological Breakthrough

The use of subcutaneous transmitters represented a methodological breakthrough, providing more reliable and longer-lasting monitoring than previously possible with external attachment methods.

The Scientist's Toolkit: Research Essentials

Tool/Method Primary Function Application in Dove Research
Subcutaneous Radio Transmitters Tracking individual bird movements and nest locations Monitoring nesting activities, success rates, and breeding chronology 1
Open-Population Capture-Recapture Models Estimating population parameters Measuring immigration, recruitment, and population growth in breeding colonies 4
Impervious Surface Mapping Quantifying urbanization intensity Analyzing relationships between urban development and bird behavior 2
Controlled Feeding Trials Assessing foraging behavior Measuring species responses to novel food sources across urban gradients 2
i-Tree Canopy Calculating impervious surface coverage Classifying study sites along an urbanization gradient 2

Beyond Breeding: Comprehensive Urban Adaptations

Foraging Behavior

Research from the Phoenix metropolitan area reveals how White-winged Doves navigate the urban buffet. In feeding trials conducted across a gradient of urbanization, scientists discovered that time to first visit at feeding stations was negatively correlated with the amount of impervious surface—meaning doves in more urbanized areas approached novel food sources more quickly 2 .

However, when compared to other dove species, White-winged Doves showed intermediate boldness. Non-native doves like Rock Pigeons and Eurasian Collared-Doves were quicker to visit feeding stations, while native doves like Mourning Doves and White-winged Doves were somewhat more cautious 2 . This balanced approach to risk and reward may contribute to their urban success.

Winter Survival Strategies

A study conducted in northwestern Mexico during winter revealed additional adaptations. White-winged Doves demonstrated nuanced responses to different types of human disturbance:

Pavement Cover

Limited their density (possibly by reducing access to preferred feeding substrates)

Pedestrians & Building Cover

Actually increased dove density, likely providing food and shelter opportunities respectively

Surveillance Behavior

Higher vigilance in urban grey areas and reduced alertness in urban green spaces, suggesting they can accurately assess threat levels and protective cover across the urban matrix

Conservation Implications and Future Research

The White-winged Dove's successful urbanization offers both hope and challenges for conservationists. On one hand, it demonstrates that some species can adapt to human-dominated landscapes. On the other, it raises questions about how urban populations might differ from their wild counterparts ecologically and genetically.

Ongoing Research

A current project at the Caesar Kleberg Wildlife Research Institute aims to assess the "space use and resource selection of White-winged Doves in the non-breeding season" using GPS-GSM telemetry devices 6 .

This research will provide crucial information about how doves navigate urban environments outside the breeding season—an often overlooked yet critical part of their annual cycle.

Management Strategies

The National Dove Task Force continues to monitor dove populations and revise management strategies, including harvest regulations for White-winged Doves in the Central and Pacific Flyways 3 .

As these birds continue to expand their urban presence, such management efforts will increasingly need to consider their unique urban ecology.

Conclusion

The White-winged Dove's journey from rural scrublands to city parks offers a compelling narrative of wildlife adaptation in the Anthropocene. Through extended breeding seasons, flexible nest site selection, and behavioral plasticity, these resilient birds have not merely persisted but have flourished in human-altered environments.

Their success story reminds us that cities are not biological deserts but rather novel ecosystems where evolutionary processes continue to unfold. As we watch a White-winged Dove tend to its nest in a neighborhood tree, we're witnessing more than just bird behavior—we're observing the remarkable capacity of life to adapt, persist, and find opportunity in the places we call home.

The next time you hear that distinctive "who-cooks-for-you" call echoing between buildings, take a moment to appreciate the urban adapter behind the song—a bird that has rewritten the rules of desert living to become a true city slicker with wings.

References