<p> The foraging guilds of terrestrial birds have been a focus of past studies; however, little is known about the guilds in seabirds, except for certain species and localities. To overcome this gap, we developed a classification of foraging guilds of seabirds. We compiled a global database of 311 seabird species (representing 90% of all known seabird species, totaling 346) and assigned each species its diet type and foraging strategy. Diets included categories such as mollusks and fish, while strategies included categories like diving or aerial capture. In turn, both diets and strategies were classified into subcategories, such as herbivores and surface foragers, respectively. Across all seabirds, there were 22 types of diets and 30 types of strategies to capture prey. The number of diet categories per species ranged from 1 to 11, and the number of strategies ranged from 1 to 9. Our database serves as a valuable resource for future studies in evolutionary ecology. For instance, it could reveal different statistical patterns and be integrated with other types of data, such as phylogenetic, to analyze the evolutionary dynamics associated with interspecific variation in these foraging traits. </p>