Roberto Dabbene Lariformes of the Argentine Republic (Part 3a) https://doi.org/10.56178/eh.v1i4.43 PDF (Spanish) 213-220
Carlos A. Marelli On the stomach contents of some birds https://doi.org/10.56178/eh.v1i4.44 PDF (Spanish) 221-228
Julio Koslowsky Pygmy Owl Glaucidium nanum (King)—a rare case of mimicry https://doi.org/10.56178/eh.v1i4.45 PDF (Spanish) 229-235
Roberto Dabbene Notes on a Collection of Birds from Martín García Island https://doi.org/10.56178/eh.v1i4.46 PDF (Spanish) 236-248
Aníbal Cardoso The Conquistadors' Fantastical Ornithology https://doi.org/10.56178/eh.v1i4.47 PDF (Spanish) 248-255
A. de Winkelried Bertoni Bird Species New to Paraguay https://doi.org/10.56178/eh.v1i4.48 PDF (Spanish) 255-258
Roberto Dabbene Rare or New Bird Species in the Argentine Republic https://doi.org/10.56178/eh.v1i4.49 PDF (Spanish) 259-266
Carlos Samuel Reed Brief Notes on the Nests and Eggs of Some Birds in the Mendoza Mountain Range https://doi.org/10.56178/eh.v1i4.50 PDF (Spanish) 267-273
A. de W. Bertoni Notes on the Birds of Paraguay I https://doi.org/10.56178/eh.v1i4.52 PDF (Spanish) 284-287
Héctor T. Ambrosetti Notes on Some Birds of Prey https://doi.org/10.56178/eh.v1i4.53 PDF (Spanish) 287-290
R. D. Nest and eggs of the tyrant flycatcher Phylloscartes ventralis angustirostris (Lafr. et D'Orb.) https://doi.org/10.56178/eh.v1i4.55 PDF (Spanish) 292
