Woody plant encroachment
Birds: birds react differently to woody encroachment. Birds that need bushes can deal with woody encroachment better than those that need open grassland. But also the birds that live in bushes, suffer when the bushes become too dense. Examples of birds than do not do well under woody encroachment are the Secretarybird, Grey go-away-bird, Marico sunbird, lesser prairie chicken, Greater Sage-Grouse, Archer's lark, Northern bobwhite and the Kori bustard. In Namibia, the Cape vulture move to other places when there are more than 2,600 woody plants per hectare. In North America woody encroachment can be bad for many types of birds. They may not have enough space to live and find food, which can make it hard for them to survive. This is a big concern.