physiology Archives - British Ornithologists' Union

When kestrels turn pale

By Petra Sumasgutner|2025-09-04T11:16:55+00:0015 Sep 2025|BOU-funded, colouration, physiology|

What colour tells us about bird health in human-dominated landscapes

What variable to choose?

By Krista Oswald|2023-11-13T09:13:17+00:0013 Nov 2023|adaptation, Africa, climate, climate change, monitoring, physiology, reproduction|

Implications of variable choice when estimating vulnerability to climate change

Being similar, nesting different

By Adrian Barrero Diego|2023-07-19T13:39:05+00:0024 Jul 2023|avian biology, passerines, physiology, plumage, reproductive signalling, woodland birds|

Can the choice of nesting site facilitate species coexistence?

The smell of flycatchers

By Marc Gilles|2023-07-17T11:43:51+00:0020 Jul 2023|avian biology, passerines, physiology, plumage, reproductive signalling, woodland birds|

Chemical analysis reveals social information in preen oil

Body condition and reproduction in declining diving ducks

By Dorota Gajdošová|2023-05-01T14:50:17+00:001 May 2023|avian biology, breeding biology, breeding success, colour ringing/banding, eggs, fieldwork, IBIS, incubation, nesting success, parasitism, physiology, population dynamics, population structure, waterbirds|

Increased body condition affects duck egg mass and hatchability

The mysterious basis of egg shape in birds

By D. Charles Deeming|2023-04-19T11:26:07+00:0027 Apr 2023|avian biology, breeding biology, egg shape, eggs, IBIS, morphology, physiology|

How do birds produce asymmetrical eggs?

Genes of a feather flock together?

By Kurt Burnham|2022-12-18T10:58:09+00:002 Jan 2023|avian biology, bird assemblages, colonial birds, Genetics, global change, IBIS, island birds, phenotypic variation, physiology, population structure, puffins, Seabirds, Tundra, waterbirds|

An unexpected correlation between body size and subspecies designation within a single puffin colony in High Arctic Greenland. A result of climate change?

Colour-by-stressor?

By Alana Krug-MacLeod (she/her)|2022-11-18T20:49:15+00:0024 Nov 2022|adaptation, avian biology, colouration, corticosterone, early career, early-career researcher, ECR, IBIS, physiology, shorebirds|

Pre-hatch temperature stress linked to bird colouration in adulthood

Through sickness and in health

By Olivia Hicks|2022-10-26T20:05:36+00:0027 Oct 2022|avian biology, biomonitoring, bird handling, BOU-funded, early career, ecology, ECR, fieldwork, penguins, physiology, Seabirds, stress|

How does handling time affect innate immune function in Adélie Penguins?

Snowy days and Tawny Owls

By Jente Ottenburghs (he/him)|2022-05-18T09:43:15+00:0019 May 2022|adult survival, bird vision, camouflage, colour-polymorphism, nocturnal birds, physiology, plumage, predation, raptors, winter|

Are grey colour morphs better protected against predation?