Find out more about emergent aquatic plants.

Methane (CH4) is the second most important greenhouse gas after CO2 that is produced by human activities.

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Downloadable and printable guides on identification of common freshwater invertebrates found in New Zealand waterways and lakes.

The 3-panel Soil Moisture Deficit (SMD) map shows the historical soil moisture deficit at the date shown (left), the soil moisture deficit at the same time last year (middle) and the current soil moisture deficit (right).

Common questions about storms and cyclones in New Zealand.

The New Zealand Palaeotsunami Database (Database) brings together all known information about tsunamis that occurred prior to written records.

The majority of New Zealanders are able to recall a story about catching eels when they were children.

More information about our online freshwater databases.