1. An obligate brood parasite, the Screaming Cowbird (Molothrus rufoaxillaris), more than doubled its range expanding northeastward in the last decades

   • Rafael Dantas Lima

   Short Communication 01 June 2021 Pages: 63 - 67

   

2. Breeding biology of the Dark-billed Cuckoo Coccyzus melacoryphus (Aves: Cuculidade) in a semi-arid Neotropical region

   • Victoria Helen Figueiredo Paixão
   • Phoeve Macario
   • Mauro Pichorim

   Original Article 30 June 2021 Pages: 68 - 75

   

3. Variations in defensiveness of a nesting raptor based on the number of human observers near the nest

   • Matthew Mo
   • David R. Waterhouse

   Short Communication 10 June 2021 Pages: 76 - 78

   

4. First record of courtship display of Strix huhula (Strigiformes: Strigidae) in the Brazilian Western Amazon

   • Marllus Rafael Negreiros de Almeida
   • Jessica Gomes da Costa
   • Igor Oliveira

   Short Communication 26 May 2021 Pages: 79 - 83

   

5. Sex-specific seasonal body mass variation in the Pale-breasted Thrush (Turdus leucomelas)

   • Felipe Rangel Floreste
   • Augusto Florisvaldo Batisteli
   • Marco Aurélio Pizo

   Short Communication 21 June 2021 Pages: 84 - 88

   

6. The rediscovery of the Crested Eagle (Morphnus guianensis) in Rio Grande do Sul state, Brazil

   • Dante Andres Meller
   • Ademir Fick
   • Carlos Benhur Kasper

   Short Communication 22 June 2021 Pages: 89 - 93

   

7. Annotated checklist of the birds of Brazil by the Brazilian Ornithological Records Committee—second edition

   • José Fernando Pacheco
   • Luís Fábio Silveira
   • Vitor de Q. Piacentini

   Original Article 26 July 2021 Pages: 94 - 105

8. Tracking Cuban Martin (Progne cryptoleuca) migration to wintering location and back using geolocators: solving a mystery

   • Ianela García-Lau
   • Saeedeh Bani Assadi
   • Kenneth Meyer

   Original Article 16 July 2021 Pages: 106 - 112

   

9. An evidence-based overview of hybridization in tinamous

   • Jente Ottenburghs

   Original Article Open access 20 May 2021 Pages: 113 - 117

   

10. Obituary: Walter Adolfo Voss (1933–2020)

    • Ismael Franz
    • Carla S. Fontana
    • Fernando C. Straube

    News 20 July 2021 Pages: 118 - 121

    

11. Correction to: A vagrant black-headed Gull (Chroicocephalus ridibundus) documented from Saint Peter and Saint Paul archipelago: Brazil’s first record

    • Antônio Coimbra de Brum
    • Renata Brentano
    • Maria Virginia Petry

    Correction 25 May 2021 Pages: 122 - 122