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Tracks and Signs of the Animals and Birds of Britain and Europe by Lars-Henrik Olsen

10,000 Birds

I don’t mind that they share the world with other creatures, and I have even developed an appreciation for mammals, reptiles and amphibians – but only so long as watching them doesn’t collide with my finding birds. There are several books on feathers that also include some footprints of birds, maybe owl pellets.

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Here’s the new bird family tree. It’s amazing.

10,000 Birds

’s bird family tree in a new tab and follow along as you read. The extinction event that wiped out the pterosaurs, the non-avian dinosaurs, and so much other life created enormous opportunity for new organisms to diversify and thrive (lucky for us placental mammals!), In 2008, Nick Sly published a review of Hackett et al.

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