I've recently been reading up about the 'Trekbokke' - the mass migration of springbok together with other large herbivores (white-tailed wildebeest, quagga, blesbok and eland) in the Karoo of South Africa during the 1850s.*
It made me think that I have never seen an exhibit dedicated to migratory animals that really illustrates their journey or its impacts - it could include multiple paddocks for a species, each one showing a differing environment, coupled in with extra species that are somehow involved with the migration. Although I'm not usually a fan of added technological 'experiences' in a zoo setting (cinemas and the like), I think a 4D cinema that puts visitors into the heart of such a migrating herd would be an effective addition - the accounts of the thundering hooves and the drumming of the ground under thousands of legs, if moved over into a cinematic setting, would be a feature that elevates the exhibit above other hoofstock exhibits. It would certainly be an improvement in visitor experience over the standard 'hoostock in a field' that is invariably the first exhibit to get the chop when a zoo upgrades.
And its not just springbok and co that such a display could be made for - looking at this paper below there are many mass migratory ungulates that could be exhibited in such a fashion; as well as the obvious species such as wildebeest, reindeer and American bison, there are other species that could feature in such an exhibit such as kulan, scimitar-horned oryx or Siberian roe deer.
http://www.int-res.com/articles/esr2009/7/n007p055.pdf
* An account of a trekbokke migration is included in the link below:
BloemhofKaroo: A Karoo story - springbok migrations