Population trends of common breeding birds in Germany 1990–2018 Johannes KampClaudia FrankChristoph Sudfeldt Original Article Open access 22 October 2020 Pages: 1 - 15
Seasonal changes in distribution and abundance of a local Corncrake population Michał BudkaPatryk KokocińskiMaria Machura Original Article Open access 13 October 2020 Pages: 17 - 29
How many are left? Density and population size of the endangered Sierra Madre Sparrow across central Mexico Rubén Ortega-ÁlvarezRafael Calderón-ParraLuis A. Sánchez-González Original Article 30 September 2020 Pages: 31 - 41
The dynamics of historical and recent range shifts in the ruffed grouse (Bonasa umbellus) Utku Perktaş Original Article 12 October 2020 Pages: 43 - 52
Factors controlling the migration phenology of Siberian Phylloscopus species László BozóTibor CsörgőWieland Heim Original Article Open access 11 August 2020 Pages: 53 - 59
Migration route, stopping sites, and non-breeding destinations of adult Black-tailed Godwits breeding in southwest Fryslân, The Netherlands Mo A. VerhoevenA. H. Jelle LoonstraTheunis Piersma Original Article Open access 17 August 2020 Pages: 61 - 76
Migration gives sleepless nights to the birds: a study on a Palaearctic–Indian migrant, Emberiza bruniceps Anupama YadavJyoti TiwariSangeeta Rani Original Article 27 October 2020 Pages: 77 - 87
Variation in timing of breeding of five woodpeckers in a primeval forest over 45 years: role of food, weather, and climate Tomasz WesołowskiGrzegorz HebdaPatryk Rowiński Original Article Open access 11 September 2020 Pages: 89 - 108
Age structure in a newly established and increasing population: initially high proportion of young birds among nesting Great Grey Owls Geir A. SonerudRoar SolheimTrond Berg Original Article Open access 16 August 2020 Pages: 109 - 118
Survival during the pre-fledging period rather than during post-fledging drives variation in local recruitment of an endangered migratory shorebird, the Southern Dunlin Calidris alpina schinzii Veli-Matti PakanenRobin HagstedtDonald Blomqvist Original Article Open access 09 September 2020 Pages: 119 - 124
Breeding habitats and long-term population numbers of two sympatric raptors—Red Kite Milvus milvus and Black Kite M. migrans— in the mosaic-like landscape of western Poland Grzegorz MaciorowskiPiotr ZduniakMichał Polakowski Original Article Open access 14 August 2020 Pages: 125 - 134
Recent increase in annual survival of nesting female Common Scoter Melanitta nigra in Iceland Ib K. PetersenMorten FrederiksenAnthony D. Fox Original Article 22 September 2020 Pages: 135 - 141
Phenological mismatch between breeding birds and their surveyors and implications for estimating population trends Dario MassiminoSarah J. HarrisSimon Gillings Original Article 30 September 2020 Pages: 143 - 154
Human presence outweighs non-anthropogenic factors as a driver of avian nest parasite loads Lauryn BenedictNora E. CovySteven T. Stier Original Article 24 August 2020 Pages: 155 - 164
Mongolian Short-toed Lark Calandrella dukhunensis, an overlooked East Asian species Per AlströmGombobaatar Sundev Original Article Open access 23 September 2020 Pages: 165 - 177
Which trophic discrimination factors fit the best? A combined dietary study of a coastal seabird Annick MorgenthalerAna MillonesEsteban Frere Original Article 27 August 2020 Pages: 179 - 190
Correction to: Which trophic discrimination factors fit the best? A combined dietary study of a coastal seabird Annick MorgenthalerAna MillonesEsteban Frere Correction 16 December 2020 Pages: 191 - 192
Stable isotopic analysis of stuffed specimens revealed the feeding habits of Oriental Storks Ciconia boyciana in Japan before their extinction in the wild Kota TawaShiro Sagawa Original Article 12 August 2020 Pages: 193 - 206
Testing the utility of condition indices in nestling swallows: a quantitative magnetic resonance approach Andrew T. BeauchampJackson W. KusackChristopher G. Guglielmo Original Article 09 September 2020 Pages: 207 - 219
Male Great Tits (Parus major) adjust dear enemy effect expression in different breeding stages Longru JinJingnan LiangHaitao Wang Original Article 09 September 2020 Pages: 221 - 229
Clinal variation in the polymorphic Black Sparrowhawk Accipiter melanoleucus is unrelated to infection by the blood parasite Haemoproteus nisi Samantha McCarrenPetra SumasgutnerArjun Amar Original Article 04 October 2020 Pages: 231 - 241
Vocal and non-vocal behavior interact differently in territorial strategies of two sympatric Rallidae species Jan JedlikowskiMarcin PolakPaweł Ręk Original Article Open access 14 August 2020 Pages: 243 - 254
Time available for moulting shapes inter- and intra-specific variability in post-juvenile moult extent in wheatears (genus Oenanthe) Cristian Pérez-GranadosJuan A. CallejaYosef Kiat Original Article 10 October 2020 Pages: 255 - 264
Local timing of rainfall predicts the timing of moult within a single locality and the progress of moult among localities that vary in the onset of the wet season in a year-round breeding tropical songbird Chima J. NwaoguWill Cresswell Original Article Open access 10 October 2020 Pages: 265 - 276
Social interactions change with season and age in Northern Bald Ibis Verena Puehringer-SturmayrTanja StiefelDidone Frigerio Original Article Open access 08 October 2020 Pages: 277 - 288
Patagonian glacial effects on the endemic Green-backed Firecrown, Sephanoides sephaniodes (Aves: Trochilidae): evidence from species distribution models and molecular data Ignacio AcostaGustavo S. CabanneJuliana A. Vianna Original Article 01 October 2020 Pages: 289 - 301
The optimal listening period for an effective assessment of bird richness and composition: a case study of Neotropical forest Carlos B. de AraújoMarcelo JardimLuiz dos Anjos Short Communication 28 August 2020 Pages: 303 - 306
Avoidance of high-risk linear structures by Skylarks in the early breeding season and implications for conservation management Manuel PüttmannsNiko BalkenholEckhard Gottschalk Short Communication Open access 12 November 2020 Pages: 307 - 312
Variable or atypical? Comparing unusual songs of the Tufted Titmouse with a citizen-science database Mark E. HauberDavid M. TaylorJeffrey D. Brawn Short Communication 04 November 2020 Pages: 313 - 316