The flag with a yellow field and a defaced Union Jack in the canton is Niue’s flag.
Niue adopted its flag on 15 October 1975. It is an unusual British-derived design because the Union Jack appears on a golden-yellow field rather than the more familiar blue or red background. The Union Jack is “defaced” by five yellow stars: one larger star inside a blue disc at the center and four smaller stars arranged around it.
The flag’s symbols connect Niue to both Britain and New Zealand. The Union Jack recalls the protection granted by the United Kingdom in 1900, while the four surrounding stars represent the Southern Cross and Niue’s relationship with New Zealand. The yellow field symbolizes Niue’s sunshine and the warm feelings of its people toward New Zealand.
A common mix-up is with other Pacific flags that use a Union Jack, including Fiji, Tuvalu and the Cook Islands. Niue is distinctive because its field is yellow and its Union Jack carries five stars.