Glistening-green Tanager (Chlorochrysa phoenicotis), family Thraupidae, order Passeriformes, Ecuador

Tit-like Dacnis (Xenodacnis parina), male, family Thraupidae, order Passeriformes, Peru

Blue-black Grassquit (Volatinia jacarina), family Thraupidae, order Passeriformes, Jalisco, Mexico

Paradise Tanager (Tangara chilensis), family Thraupidae, order Passeriformes, Peru

Saffron Finch (Sicalis flaveola), male (most likely), family Thraupidae, order Passeriformes, Valle del Cauca, Colombia

Not a "true finch", this bird is in the tanager family.

Multicolored Tanager (Chlorochrysa nitidissima), family Thraupidae, order Passeriformes, endemic to Colombia

here in my yard is currently Sicalis flaveola nesting season (im being cussed out daily by little feather balls because i DARE walk around in MY house close to where some couples have decided to build their nests), and i've noticed one couple where both of the birds are yellow.

this species has the adult male yellow and the adult female grey (predominantly grey. may also be a yellowed grey), but it is clear that these two are very very bright yellow. would it be a case of a unusually colored female or is it a male pair? and if it is a male pair, does the nesting instinct happens even if there are no eggs in the oven?

Saffron Finch (Sicalis flaveola), family Thraupidae, found in the Caribbean and parts of South America

Not in the true finch family. In the tanager family.

Okay, so, there is apparently a lot of variation int he appearance of females... some are much more yellow, and some are rather brown and gray. Saffron finches have a few subspecies, and females have a lot of variation across their geographic range.

So, you are witnessing a male-female pair in which the female is just very yellow.

Male - Hawaii (introduced) - photograph by Sharif Uddin

Female - Ribeirão Grande, São Paulo, Brazil - photo by Tomas Grim

Female (or immature) - São Francisco de Paula--Rota das Barragens, São Francisco de Paula, Rio Grande do Sul, Brazil

Shining Honeycreeper (Cyanerpes lucidus), male, family Thraupidae, order Passeriformes, Panama