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CAPTION Panels A and B show the side-on and underneath view of a hummingbird passing through an aperture sideways. C and D show the same views of the hummingbird passing thorough an aperture like a bullet with its wings swept back. CREDIT Marc Badger https://journals.biologists.com/jeb/article-lookup/doi/10.1242/jeb.245643

Life

Hummingbirds have two amazing ways to fly through tiny gaps

High-speed cameras reveal that hummingbirds fly sideways to fit through narrow openings, or fold back their wings to shoot through like an arrow

Life

Roosters may be able to recognise themselves in a mirror

Male Satin Bowerbird (Ptilonorhynchus violaceus)

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Why birds’ eyes can be blue, green, pink or orange

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Chickens made resistant to bird flu with CRISPR gene editing

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Hybrid puffins may have emerged in the 20th century due to warming

Two thick-billed murres

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Young seabird couples get ‘divorced’ with little immediate benefit

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Male cockatoos make customised drumsticks for their mating displays

Life

Gannets prefer to roll either right or left when they dive

Technology

Animal motion-capture studio tracks bird flocks and insect swarms

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Nearly every kakapo’s genome has been sequenced to help save them

Genomic information for almost all of the 250 kakapos in New Zealand will help determine how best to move birds around to increase genetic diversity

Life

Emperor penguin colonies lost all their chicks due to ice breakup

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Extremely rare black penguin spotted in Antarctica

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Do honeyguides really help honey badgers find bees鈥� nests?

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Sick blackbirds go to bed earlier just like us