Enables DNA-binding transcription factor activity; double-stranded DNA binding activity; and sequence-specific DNA binding activity. Involved in several processes, including mammary gland development; receptor signaling pathway via JAK-STAT; and response to ethanol. Acts upstream of or within cellular response to cytokine stimulus and cellular response to organic cyclic compound. Located in cytoplasm and nucleus. Orthologous to human STAT5A (signal transducer and activator of transcription 5A). [provided by Alliance of Genome Resources, Apr 2022]