Vaccines have also been developed to protect poultry from avian influenza. Vaccines for poultry have been formulated against several of the avian H5N1 influenza varieties. Recommendations involve restructuring commercial markets to improve biosecurity against avian influenza. Falcons are known to be very susceptible to avian influenza. Pigeons are, however, at potential risk for carrying and spreading avian influenza. Wild birds may harbor diseases such as avian polyomavirus. Laboratory mice have been infected successfully with a variety of avian flu genotypes. Biden also worked to promote funding to research avian influenza. There is an abundance of marine and avian wildlife. ERBB is abbreviated from erythroblastic oncogene B, a gene isolated from avian genome. Over 90% of avian species are socially monogamous. Both adaptations may make them better at avoiding avian predators. Nikumaroro is sporadically visited by biologists attracted to its extensive marine and avian ecosystems. Only 3% of avian species have a phallus. Differential diagnosis include riboflavin deficiency and avian encephalomyelitis.