. Bird lore . hes long by half an inch wideproves in practice to be large enough forthe largest bird. Carlos Spegazzini de-scribes an exceedingly interesting case ofmelanism in small Doves (Columbinapicui) which, in captivity, acquired ablackish plumage, but when releasedregained their normal coloration at thefirst molt after they had been given theirliberty. When these birds were recagedthey again became melanistic. Other biographical notes of more thanusual interest relate to a common Argen-tine Duck (Metopiana peposaca) and theshort-eared Owl {Asia flammeus). Theformer is believed by Demetr
. Bird lore . hes long by half an inch wideproves in practice to be large enough forthe largest bird. Carlos Spegazzini de-scribes an exceedingly interesting case ofmelanism in small Doves (Columbinapicui) which, in captivity, acquired ablackish plumage, but when releasedregained their normal coloration at thefirst molt after they had been given theirliberty. When these birds were recagedthey again became melanistic. Other biographical notes of more thanusual interest relate to a common Argen-tine Duck (Metopiana peposaca) and theshort-eared Owl {Asia flammeus). Theformer is believed by Demetrio Rodri-guez not to have a nest of its own, but,like our Cowbird, to be parasitic upon other aquatic species; the latter is shownby Antonio Pozzi to capture tucu-tucus{Ctenomys), a small rodent resembling ourgophers {Geomys) in appearance and habits,by sitting at the openings to the subter-ranean runways with extended claws inthe attitude depicted in the accompanyingdrawing, which we reproduce from THE SHORT-EARED OWL AS AGOPHER TRAP.—From El Hornero Under the head of Notes on the Birdsof Paraguay, the well-known Paraguayanornithologist, A. de W. Bertoni writes ofthe insect-eating habits of Herons, includ-ing the White Egret (Herodias egretta),of the effects of a cold wave on the bird-life of the upper Parana, and upon thelittle - known nesting habits of certainParaguayan birds. A record of special interest to NorthAmerican ornithologists is contained in apaper on the birds of northwestern Argen-tina by Luis Dinelli, who states thatBobolinks in great flocks arrive at Tucu-man at the beginning of summer [Novem-ber]. True to the unfortunate habit whichhas recently caused our Biological Surveyto declare an open season on these birds,Senor Dinelli says that they visit the rice-fields where, feeding at this season only onrice, they cause appreciable Bobolinks song, Senor Dinelli writes,is not lacking in melody, but since thebirds all sing together, it is no
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, booksubjectorn
