From Wikipedia, the free encyclopedia
- expand lead
- Fix on British English, copyedit
- Add alt texts for images
- Expand description (more on plumage etc.)
- Add info on population estimates, maybe including for North America – text formerly gave estimate from 1940s
- Add details on evolution and fossil record (some should go at Passer)
- How long is the copulation usually? How many ejaculatory thrusts are there? (from GAN)
- How do helpers around the nest help? (from GAN)
- How can mated birds recognise each other (from GAN)
- Introduced; but why?
