👉 The term "Leidyanidae" encompasses a family of birds, known for their distinctive beak and long necks, with a wide range of feathers that are adapted for flight. This family includes several species, including the common leidyan, which is found in Europe and North Africa. Other members of this family include the black-breasted leidyan (Leidania blackbrowne) and the white-leidyan (Leidania whitechapel).