The reserves are linked by corridors of vegetation in adjacent private land and along roads and Travelling Stock Routes.

[2] Ingalba Nature Reserve (4013.5 ha) lies 10 kilometres west of Temora on the Burley Griffin Way, and was gazetted in three stages.

Ingalba Nature Reserve has the most varied topography, containing small drainage lines, and with elevations from 315m to 402m at Mt Wharrun.

The landscape is characterised by a complex system of sedimentary, volcanic and igneous rocks of the Lachlan Fold Belt.

There is an indistinct boundary with the Upper Silurian geology predominant in Big Bush and Ingalba Nature Reserves.

On the gentle slopes and flats, deposition of alluvial materials has produced deeper, dark brown soils.

The mugga ironbark - western grey box woodland community was considered to be inadequately conserved in NSW and vulnerable to further loss by Benson in 1989.

The reserves contain limited discrete patches of weeds including Paterson’s curse (Echium plantagineum) and horehound (Marrubium vulgare).

Autumn and winter flowering eucalypts, especially mugga ironbark, occasionally attract the endangered swift parrot (Lathamus discolor), and on rare occasions regent honeyeaters (Xanthomyza phrygia).

Malleefowl (Leipoa ocellata) were once present at Ingalba and Big Bush Nature Reserves, but individuals or active breeding mounds have not been observed for over twenty years and it is considered to be locally extinct.

It comprises important sites, structures and relics that may have aesthetic, historic, scientific and social significance to present and future generations.

Main forms of past disturbance include clearing (especially in southern portions of Ingalba and Big Bush Nature Reserves), sheep grazing, and logging for fences and firewood.

Mugga ironbark, grey box and white cypress pine have been extensively logged at Ingalba Nature Reserve.

Regeneration since reservation has resulted in a progressive increase in vegetation density with significant tree and shrub regrowth.

Timber was removed for many purposes, such as fencing posts, firewood, charcoal for farm forges, shed poles and railway sleepers.

Subsidiary material, such as tins and bottles, has been left behind from logging activities and these are scattered throughout Ingalba Nature Reserve.

Both Ingalba and Pucawan Nature Reserves also served as a depository for rubbish dumping by many generations of neighbouring farmers.

The Casuarina Track in Ingalba Nature Reserve is part of an old horse-drawn vehicle route between Temora and Mimosa Station.