Chick nutrition and mortality in captive willow ptarmigan (Lagopus l. lagopus).
D000818:Animals; D000830:Animals, Laboratory; D001715:Bird Diseases / Q000453:epidemiology / Q000401:mortality*; D001717:Birds / Q000254:growth & development*; D001835:Body Weight; D004032:Diet; D005260:Female; D008297:Male