The Brown-throated Sunbird is a relatively large (14 cm), heavy sunbird with a thick bill.
The male has a brown face, pinkish-brown throat and a blue-green crown and back. 
The female is olive-green above and yellowish below and can be distinguished from other sunbirds by her robust size and the broken pale yellow eyerings (clearly visible on the photos). 
It is found in a wide range of semi-open habitats in south-east Asia.

1st & 2nd photo: A female. Singapore Botanic Gardens, Singapore, 7 November 2022
3rd, 4th & 5th photo: A female. Sungei Buloh Wetland Reserve, Singapore, 25 October & 8 November 2022