Sperm Storage Tubules (SSTs) allow female ducks to store sperm for extended periods, decoupling insemination from fertilization and enabling delayed fertilization. Female ducks have more control over ...

What if you could tell a potential partner’s STD status just by looking at them? That’s the evolutionary advantage that ducks appear to have. It turns out mallard ducks have a problem with the males ...

From ducks to dolphins, females have developed sex organs that help them deter undesirable suitors and derive pleasure from non-reproductive behavior Rachel E. Gross Biologists of the past often ...

Cute loving couple of colorful ducks. Mandarin duck Aix galericulata female and male. Loving birds, animal love. Smooth background. Amorous look. European birds ...