Reservoir/habitat expanded clay 25L

Expanded clay is provided in a 25 litre bag and is used to retain water in the reservoir/wet habitat areas of the NatureArk to provide moisture for plant growth, and damp conditions to support micro-organisms, amphibians and reptiles.


Free delivery

In stock

"Not only has BioScapes helped believe housing work toward our environmental objectives, but we’ve also benefitted the local community and helped people get involved in enhancing the environment."

How it works

As seen in our installation demonstration video, the NatureArk contains a number of habitats that enable multiple species to coexist and interact as they would in a natural ecosystem. 

This includes a removeable integrated wet and dry habitat, together with a water reservoir, as well as central and side planting areas. It has full ground contact giving connectivity from the integrated deadwood habitat and planting areas to the surrounding ecosystem.

Its unique design allows the roots of all plants to access water in the reservoirs, but also find their way down the sides and into the ground below.

Click on the video below for a demonstration of how simple it is to install a NatureArk.

Hedgehog hideaway (dry habitat)

Designed to protect a variety of species

Deadwood habitat – approx. 20 litres

  • A cool, damp shelter that is attractive to amphibians, invertebrates, arthropods, and reptiles.
  • Located in the centre of the NatureArk but with access to the ground below and to the outside of the unit.
  • Protected by the side planting areas.

Wet habitats and dry habitat

  • Specially designed for small mammals, hedgehogs and amphibians.
  • Located at each end of the unit.
  • Sheltered by the deadwood habitat which provides insulation, protection from predators and reduces external noises which can disturb wildlife.

Core reservoir – approx. 20 litres

  • Positioned above the deadwood habitat to provide additional shelter, keeping the centre dry for species preferring a drier environment.
  • Provides an additional wet habitat and is designed to overflow into the separate wet habitat unit below, keeping it moist for species requiring this type of environment.


Main planting area – approx. 260 litres

  • The topsoil/growing media used here provides insulation and protection to the deadwood habitat below.
  • For recommendations of native species that are suitable for attracting pollinators, take a look at our planting list.



Constructed from untreated timber to avoid the presence of unwanted chemicals, it will naturally decompose over time to further enrich its surroundings.

Height: 50cm
Length: (front to back): 93cm
Width (front face): 116cm

Installation instructions are included

Patents granted: GB 2588793 & GB 2577671

*Package includes free topsoil, deadwood and clay to fill your NatureArk, plus free delivery, total value of £155 (inc.VAT)

Fully built NatureArk showing empty tray, rot hole, butterfly roost and coal tit box