Robins are famously aggressive territorial birds whose welfare involves intense resource competition, with garden management significantly affecting individual robin welfare outcomes.
Robin welfare involves the intense costs and benefits of a highly territorial lifestyle. The famous aggression of robins - which will fight intruding males to death in sustained battles over territory - represents a welfare harm that is fundamental to their social ecology rather than an anomaly. Territorial fighting causes injury and death that represents genuine welfare harm to the losing animal. Individual robins that secure high-quality territories with abundant invertebrate prey, supplementary garden feeding, and safe nesting sites have substantially better welfare outcomes than those forced into marginal territories with inadequate resources. Garden management decisions that maintain moist soil, provide supplementary mealworms, and include earthworm-rich lawns benefit robins by improving the resource quality of garden territories. Night-time singing by urban robins, triggered by artificial light that disrupts their circadian response to dawn, may represent welfare harm through sleep disruption and energy expenditure, or may simply represent an adaptation to the extended 'dusk' of urban lighting. The robin's familiar comfort with human presence is an ecological adaptation to following large mammals (formerly aurochs and wild boar) whose digging exposes invertebrates - a behaviour now redirected toward gardeners.