ENDANGERED SPECIES: FWS extends public comment period for threatened cuckoo Published: Thursday, April 10, 2014 The clock has been extended on a public comment period for a proposal to list the yellow-billed cuckoo as threatened. Please subscribe to Greenwire to read the full story. Username: Password: Forgot your access codes? Recover them. Not a subscriber? Sign up for a trial. Ready to subscribe? Click here.