and they represent a really important habitat for a number of nationally threatened species which live on the dubbo site including babblers and owls.
as far as horticulture at dubbo goes i prefer it when they just leave the cypress as is and build the enclosures around them. in places the cypress gets quite dense which can be quite effective. conversely some of the 1990s exhibits resulted in rather 'clumsy' horticultural plantings. i particularly hate the weedy plants like plumbaego and umbrella sedge, boh invasive species, that are supposed to give an 'african feel' but end of looking more like potential biological hazards.
on the other hand, the indian rhino exhibit (theres nothing wrong with the exhibit, or the rhinos for that matter, as long as they breed). the zoo has just used native grasses and casuarina to landscape the area, which combined with the terai landsape and ruined buildings looks fabulous. more of this, less of the chicken wire, copper logs and plumbaego hedges.