Aspects of the grey-and-gold warbler's breeding biology were recently described by Miller et al. (2007), based on a sample of two nests.

One nest, in the Jorupe Reserve (owned and operated by the Fundación Jocotoco) of southwest Ecuador, contained two well-feathered nestlings when discovered by the authors.

When discovered, it contained four creamy white eggs with pinkish-orange and red-brown speckles concentrated at the larger ends.

Like the first nest, this second was built into a steep slope and, in this case, embedded in a natural depression at the base of a Chrysophyllum tree.

The lower portion of the body was tightly woven and readily distinguished from the loosely interwoven dome.