How to tell male and female sparrows apart?

We have sparrows living right under the roof at our dacha, so I end up watching them pretty closely. You can spot males from far away - they have a black bib and a matching black cap on their head, and their white cheeks really stand out. Females are a completely different story: grayish-beige, dull, no bright markings at all.

The main thing is not to rely just on your first impression, because from a distance you can easily get it wrong. Look closely at the throat and chest: if there's a black spot there, and it's clearly defined, it's almost certainly a male. Females have gray or dirty-white in that spot, or maybe just a slight darkening at most. Another detail that helps is the cheeks - males have white, contrasting cheeks, while females' cheeks just blend in with the rest of their head.

If you're looking from a distance and you're not sure, here's the simple rule: if the sparrow looks modest and doesn't grab your attention - it's most likely a female. Males are always more colorful, and that's evolution: females do the choosing, so males need to look good.

I've seen them pretty often on the streets and I've definitely noticed a clear difference. The males are really striking - black "mask" on the face, black bib on the chest, white cheeks. The females look much more modest, their whole coloring is grayish-beige, without any bright spots. Even from a distance if you look at a flock, you can pick out the males right away from the rest.

One more thing - the males have this black color more intense and it takes up more space on the head and chest, while with females everything is blurred and dull. It's like if an artist drew the male with a contrasting palette and then washed the female over completely with gray watercolor.

So they go by this very contrast on the chest and head, not by size or behavior - with size there's really confusion, but the color won't let you down.

The main thing is to look at the mask and bib: in males they're black and bright, in females they're gray and blurred. If you look closely, females also have light, almost whitish eyebrows, which makes their face less expressive.

When you spend a lot of time watching them (they're frequent visitors to my balcony), you realize that males are just showy characters: that whole black mask, white cheeks, and black bib scream for attention from a distance. Females look literally like gray mice next to them - blurred brownish-gray tones, no contrast at all, even the light eyebrows are barely visible.

The main thing that helps tell them apart is exactly this difference in contrast of their coloring, not the bird's size. You'll spot a male right away, but with a female you have to look at her for a while to understand she's even sitting there.