An ecological guild is a group of species that exploit the same resources, or that exploit the same or different resources in a related way. We build The Foraging Guilds of Seabirds database (FGSdb) by compiling a global database of 311 seabird species and assigning to each of them their diet types and foraging strategy. Across all seabirds, there were found 22 diets and 30 strategies. The number of diet categories for a species varied between 1 and 11, and the number of strategies varied from 1 to 9, with averages of 2.71 and 3.65, being the ratio diet/strategies of 0.74 (~3/4).