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9/20 The naturalist recalls his first pet, a fire salamander given to him on his 8th birthday.
BBC Radio 4 Extra
8/20 A 150-million-year-old feather from an animal that lived before birds had evolved.
6/20 Musings on the structures built by New Guinea's Vogelkop bowerbirds to attract mates.
5/20 The messages conveyed in the syllables, melodies and repeated phrases of singing birds.
4/20 The famous naturalist muses on the largest known egg laid by a giant bird on Madagascar.
3/20 Musings on the elusive female duck-billed platypus of New South Wales, Australia.
2/20 Musings on the world's largest blooms found deep in the steamy forests of Sumatra.
Musings on the natural history of perhaps the most lethargic beast in the animal world.
10/20 Musings on the New Guinea residents, who fooled early explorers with their adornments.