Talk:House sparrow/to do

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?