Euastacus dalagarbe

Euastacus dalagarbe is endemic to a small area in the Border Ranges National Park in New South Wales. It is known from a number of gullies and small, headwater streams in forests at altitudes of over 570 m (1,870 ft). The total area of occupancy is about 50 km² (19 sq mi) and is fragmented into eight separate locations.[1] It burrows under stones in the mud and clay to reach moist areas. It shares its range with the larger and much spinier Euastacus sulcatus which tends to be present in the larger creeks while E. dalagarbe occupies the smaller ones, many of which dry up in summer.

The species has very specific habitat requirements and is threatened by habitat loss. Forest fires or other natural disasters could significantly impact populations, and because of its fragmented range, it is particularly vulnerable to habitat loss, with little possibility of dispersing to new locations. Climate change may force it to higher elevations to find the cool waters it needs. Another cause for concern are the feral cats, foxes and domestic livestock that prey on it or pollute the waters where it lives.[1] Cane toads, which have invaded its range, may also impact on populations, and for all these reasons, the International Union for Conservation of Nature has assessed its conservation status as "critically endangered".[1]