Physical differences exist between male and female flamingos. Differences can be subtle, however, making gender determination difficult.

While both are arachnids and spine chilling to behold, there are many differences between a male vs female black widow spider ...

Now, a growing body of scientific evidence shows hundreds of genes act differently in the brains of biologically male or ...

One of the easiest ways to tell male and female hummingbirds apart is by looking at their color. Males usually have much brighter feathers than females—especially on their gorget (that flashy patch of ...

Paleontologists have long wrestled with how to differentiate between male and female dinosaurs based on their fossils.

Butterflies exhibit striking differences between males and females, a phenomenon called sexual dimorphism. These variations, impacting size, colour, behaviour, and lifespan, are driven by evolutionary ...

Gender has been long overlooked in Holocaust research. Writing in the late 1970s and early 1980s, early scholars such as Joan Ringelheim and Sybil Milton had to fight for their legitimacy in a field ...

All summer long I’ve been treated to the chatter of swallows nesting in my back porch. Even now, five chicks from a pair’s ...

Discover how biology, hormones, and social expectations combine to hide ADHD in girls, revealing the science behind why their ...

A newly discovered species, Damarchus inazuma, displays a rare split-sex trait known as gynandromorphism and takes its name from a shape-shifting anime character. Jenny Lehmann is an assistant editor ...