Russian cuckoo invasion spells trouble for Alaskan birds, study finds May 8, 2018 11:45 am by news@illinois.eduResearch Share on Facebook Tweet Email Animal biology professor Mark Hauber studies many species of brood parasites, which lay their eggs in the nests of other birds. Images Common cuckoos and oriental cuckoos in eastern Russia appear to be expanding their breeding range into western Alaska, where songbirds are naive to the cuckoos’ wily ways, researchers report. Share on Facebook Tweet Email