In fact, picking out the male or female within most bird species is rather simple, look at the color. If you do not want to breed your finches, then you must be able to tell the males from the females and separate them. Finches are social birds who live happily in mixed gender pairs as well as with same-gender companions. With several species of hummingbirds roaming the skies, you may think determining if the zippy little bird at your favorite flower is male or female would be difficult. One easy way for the vet to determine a bird's gender is to analyze the bird's DNA using a PCR-based test. Knowing how to tell the difference between male and female birds takes keen observation and a dedication to detailed birding. Sometimes the differences between male and female birds of the same species is striking, as the male’s plumage is strikingly beautiful while the female’s is plain and uncolorful. While not all species have easily visible gender differences, it is often possible to determine which birds are male or female by either appearance or behavior. It's not always so easy to tell a bird's gender, as not all species lend themselves to easy gender determination. In those cases, the best thing to do is take your bird to an avian veterinarian to determine the gender. Failure to separate male and female finches will result in a … This color will tell you the gender of the bird Well some birds. Lovebirds are friendly, affectionate, playful birds that can make good pets. They have a lot of personality in their small, colorful bodies and can brighten up your home with both their plumage and their spirits. Asked in Insects How can you tell a Crayfish's gender?