Kiwi Population
Modelling
Capture-recapture analysis, survival modelling, and population projections for Little Spotted Kiwi (Apteryx owenii) across sanctuary sites in the lower North Island of Aotearoa New Zealand.
A closer look
From a single capture-recapture dataset, the platform builds a full population picture — projections, individual trajectories, spatial patterns, and breeding dynamics. Here's what that looks like.
Population projections to 2075
Stage-structured Leslie matrix model projects the population forward 50 years from a Schnabel baseline, with a confidence band and live final-state breakdown by age class.
Per-bird recapture timeline
Every recaptured kiwi rendered as a condition trajectory across 25 years — colour-coded by body-condition Z-score, with mortality, translocation, and survival status at a glance.
Spatial distribution mapping
Every observation projected from NZTM2000 onto an interactive map, filterable by year and individual — resolving kiwi territories down to the metre across the sanctuary.
Breeding dynamics
Mate fidelity, pair formation, and breeding pairs per year — quantifying the reproductive engine that drives the projection model.
Analysis Tools
A comprehensive suite of population ecology tools built specifically for kiwi conservation research.
Capture-Recapture Analysis
Estimate population size using Lincoln-Petersen and Schnabel methods with bias correction. Track recapture rates across seasons to understand detection probability.
Survival Modelling
Calculate apparent survival rates using Cormack-Jolly-Seber models. Visualize survival curves and identify factors affecting kiwi longevity across cohorts.
Population Projections
Project population trajectories under different management scenarios. Model density dependence, carrying capacity, and the impact of predator control.
Spatial Distribution
Map kiwi locations across sanctuary sites with NZTM coordinate conversion. Track movement patterns and territory establishment over time.
Ready to explore the data?
Upload your capture-recapture datasets and start modelling kiwi population dynamics today.
Kiwi Modelling