Common patterns in the molecular phylogeography of western palearctic birds: a comprehensive review Liviu G. PârâuMichael Wink Review Open access 13 May 2021 Pages: 937 - 959
Phylogeography of Habia fuscicauda (Cardinalidae) indicates population isolation, genetic divergence and demographic changes during the Quaternary climate shifts in the Mesoamerican rainforest Vicente de J. Castillo-ChoraLuz E. Zamudio-BeltránBlanca E. Hernández-Baños Original Article 05 June 2021 Pages: 961 - 976
A new fossil from the early Oligocene of Provence (France) increases the diversity of early Gruoidea and adds constraint on the origin of cranes (Gruidae) and limpkin (Aramidae) Antoine LouchartAnaïs Duhamel Original Article 01 May 2021 Pages: 977 - 986
Stable isotopes (δ2H) in feathers identify non-breeding origins of the endangered Jankowski’s Bunting Zheng HanHai-Tao WangFrédéric Jiguet Original Article 18 May 2021 Pages: 987 - 995
No evidence that nest site choice in Pied Flycatchers is mediated by assessing the clutch size of a heterospecific, the Great Tit Tore SlagsvoldKaren L. Wiebe Original Article Open access 29 May 2021 Pages: 997 - 1007
Breeding latitude is associated with the timing of nesting and migration around the annual calendar among Purple Martin (Progne subis) populations L. R. NeufeldS. MuthukumaranaK. C. Fraser Original Article 18 May 2021 Pages: 1009 - 1024
Apparent survival and dispersal in a recovered Osprey population: effects of age, sex and social status Ülo VäliAigars KalvānsJoosep Tuvi Original Article 04 July 2021 Pages: 1025 - 1034
Sex-specific growth of nestlings of the Whiskered Tern Chlidonias hybrida, a species with sexual size dimorphism and female brood desertion Agata BanachGrzegorz NeubauerMateusz Ledwoń Original Article Open access 16 July 2021 Pages: 1035 - 1047
Higher reproductive performance of a piscivorous avian predator feeding on lower trophic-level diets on ponds with shorter food chains Janusz KloskowskiAndrzej TrembaczowskiMaciej Filipiuk Original Article Open access 13 July 2021 Pages: 1049 - 1062
Body mass during the spring migration period of two long-lived seabirds varies with capture date, age, sex, and natal origin David MonticelliHugues DefournyAndré Degros Original Article 30 May 2021 Pages: 1063 - 1074
Differential spatial migration programmes are both sex and age specific for migratory great cormorants Katherine R. S. SnellMorten FrederiksenThomas Bregnballe Original Article 05 July 2021 Pages: 1075 - 1085
Mass occurrence and habitat selection of Common Redpolls (Carduelis flammea) after a large seed crop year: snow-covered ground facilitates food access Svein Dale Original Article Open access 11 July 2021 Pages: 1087 - 1099
Gulls of a feather do not sleep whenever—circadian rhythm of activity of black-headed gulls Chroicocephalus ridibundus during the incubation period Piotr IndykiewiczDariusz JakubasJulita Gerke Original Article Open access 29 May 2021 Pages: 1101 - 1114
The impact of Sosnowsky’s Hogweed on feeding guilds of birds Emilia GrzędzickaJiří Reif Original Article Open access 26 May 2021 Pages: 1115 - 1128
Bird species use of Tapinanthus dodoneifolius mistletoes parasitising African locust bean trees Parkia biglobosa in Amurum Forest Reserve, Nigeria Islamiat A. RajiAdams A. ChaskdaColleen T. Downs Original Article 11 May 2021 Pages: 1129 - 1140
Blood plasma biochemistry and the effects of age, sex, and captivity in Short-toed Snake Eagles (Circaetus gallicus) Ryan BaumbuschVirginia MorandiniMiguel Ferrer Original Article 09 June 2021 Pages: 1141 - 1151
Learning in advance? Interspecific recognition ability in male Eurasian blackcaps Piotr Matyjasiak Original Article Open access 28 May 2021 Pages: 1153 - 1162
Seasonal and diurnal variation of vocal behaviour in duetting White-browed Sparrow Weavers Cornelia VoigtStefan LeitnerAndries Ter Maat Original Article 19 June 2021 Pages: 1163 - 1172
Phonotactic responses of Brown Rats (Rattus norvegicus) to begging calls of Starling nestlings (Sturnus vulgaris) Stephen TakácsGerhard Gries Original Article 17 May 2021 Pages: 1173 - 1181
Call rate in Common Cuckoos does not predict body size and responses to conspecific playbacks Zoltán ElekMiklós BánCsaba Moskát Original Article Open access 17 July 2021 Pages: 1183 - 1192
How urban and rural birds respond to the colour of bird feeders? Artur GolawskiHubert Sytykiewicz Original Article Open access 02 July 2021 Pages: 1193 - 1198
Female song in the Cyprus Wheatear Oenanthe cypriaca Robert PatchettAlexander N. G. KirschelWill Cresswell Short Communication Open access 27 May 2021 Pages: 1199 - 1204