European cuckoos lay very different eggs depending on the host species. Genetic analyses have revealed how this adaptation is inherited without leading to speciation.

It’s all about access to getting food. They get nectar from flowers. These females that look like males are essentially ...

The hens aren’t coming home to roost, and something’s going to have to change. Beginning in Minnesota. The hens in this case are mallards, specifically adult hen mallards, and their absence on the ...

Last weekend I watched my beautiful Indiana Hoosiers (the football team, at least) defeat the then-No. 3-ranked Oregon Ducks, stunning the college football world and flagrantly besmirching the ...

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 ...

Defense Secretary Pete Hegseth in an address Tuesday to the military’s top leaders waded back into a topic that nearly derailed his confirmation early this year and helped elevate his voice as a Fox ...

Hey Jesse, my girlfriend and I have a dinner coming up and it’s my job to choose the restaurant. It’s not a special anniversary or anything, but probably something romantic would be good? Doesn’t need ...

Department of Animal Science, Shabestar Branch, Islamic Azad University, Shabestar, Iran The present study aimed to determine the dietary lysine (Lys) requirements of Gilan native ducks (mallards) up ...

Learn how to assist your Pekin duck in creating a cozy nest to successfully incubate and brood their eggs. This video will guide you through the essential steps, from nest preparation to ensuring ...

Biological sex is usually described in simple binary terms: male or female. This works well for germ cells (sperm versus eggs), but for other body organs it is of little help. A new study by the Max ...

Elise Huchard receives funding from CNRS and the French Agence Nationale pour la Recherche (ANR). Nikos Smit does not work for, consult, own shares in or receive funding from any company or ...