ROARING MOUNTAIN POOFBIRD
oh my gosh
Scientists have long suspected that corvids – the family of birds including ravens, crows and magpies – are highly intelligent. Now, Tübingen neurobiologists Lena Veit und Professor Andreas Nieder have demonstrated how the brains of crows produce intelligent behavior when the birds have to make strategic decisions. Their results are published in the latest edition of Nature Communications.
Crows are no bird-brains. Behavioral biologists have even called them “feathered primates” because the birds make and use tools, are able to remember large numbers of feeding sites, and plan their social behavior according to what other members of their group do. This high level of intelligence might seem surprising because birds’ brains are constructed in a fundamentally different way from those of mammals, including primates – which are usually used to investigate these behaviors.
The Tübingen researchers are the first to investigate the brain physiology of crows’ intelligent behavior. They trained crows to carry out memory tests on a computer. The crows were shown an image and had to remember it. Shortly afterwards, they had to select one of two test images on a touchscreen with their beaks based on a switching behavioral rules. One of the test images was identical to the first image, the other different. Sometimes the rule of the game was to select the same image, and sometimes it was to select the different one. The crows were able to carry out both tasks and to switch between them as appropriate. That demonstrates a high level of concentration and mental flexibility which few animal species can manage – and which is an effort even for humans.
The crows were quickly able to carry out these tasks even when given new sets of images. The researchers observed neuronal activity in the nidopallium caudolaterale, a brain region associated with the highest levels of cognition in birds. One group of nerve cells responded exclusively when the crows had to choose the same image – while another group of cells always responded when they were operating on the “different image” rule. By observing this cell activity, the researchers were often able to predict which rule the crow was following even before it made its choice.
The study published in Nature Communications provides valuable insights into the parallel evolution of intelligent behavior. “Many functions are realized differently in birds because a long evolutionary history separates us from these direct descendants of the dinosaurs,” says Lena Veit. “This means that bird brains can show us an alternative solution out of how intelligent behavior is produced with a different anatomy.” Crows and primates have different brains, but the cells regulating decision-making are very similar. They represent a general principle which has re-emerged throughout the history of evolution. “Just as we can draw valid conclusions on aerodynamics from a comparison of the very differently constructed wings of birds and bats, here we are able to draw conclusions about how the brain works by investigating the functional similarities and differences of the relevant brain areas in avian and mammalian brains,” says Professor Andreas Nieder.
When I say a lot of crows pass by my home on a daily basis, I mean, a lot. This is but a smattering, I have a video (if my luck holds and I can get it to upload to either youtube or Tumblr) of the amount of birds filling the airspace around my home.
In the mean time, enjoy a flurry of photos taken about half an hour ago or so.
Sun setting over downtown Vancouver, the crows enjoying the last of the warmthe before flying en masse across the water to roost for the evening.
Pieces of red glass lying scattered on the floor, an imposive chandelier lying ontop of the broken fragments and black crows hovering over the blood red glass, picking at it and seemingly tearing it to pieces like a dead animal. ‘Carroña’ (Carrion) is a work produced for the exhibition Glasstress 201, a parallel event to the 54th Venice Biennale.
Crow Fall and Crow Consternation
Finally finished the crows on a carpet of maple leaves! When I did, I realized that I had actually started a new seasonal crow series. Crow Consternation is actually my new winter crows! I’m excited about spring and summer <3
So everyone really seemed to like artworks depicting crows. So here is a compilation of artwork by Kawanabe Kyōsai
the friends that you can make with a balcony and a bit of steak
all I can see is sniper doing this on his off days back home