The tufted duck (Aythya fuligula) is a common, migratory diving duck of Eurasia. This assembly has been produced as part of the G10K-VGP and B10K projects. Sequencing was conducted with Pacific long reads, Bionano optical maps, and 10X Genomics libraries at the Rockefeller University Vertebrate Genomes Lab led by Olivier Fedrigo, HiC at Arima Genomics, and Illumina sequencing. Genome assembly was conducted by the Olivier Fedrigo and Marcela Uliano-Silva, and supervised by Arang Rhie, using the VGP 1.5 pipeline. The primary haplotype was assembled to chromosomes, whereas the alternate just as contigs. Genome coordination and funding was done by Robert Kraus. The raw data and assembly are currently under a G10K-VGP publication embargo until removed from this description, following the G10K data use policy at the following URL: https://genome10k.soe.ucsc.edu/data-use-policies/