Climate, habitat and demography predict dispersal by an endangered bird in a fragmented landscape

Worldwide, biodiversity is threatened by human-induced habitat degradation and fragmentation. Dispersal, particularly long-distance dispersal between isolated habitat fragments, is key for population connectivity and species persistence in the face of environmental change. However, we lack understanding of how habitat fragmentation and degradation itself affect the dispersal process. To identify conditions that promote or constrain connectivity, we need to reveal how habitat, demographic, and climatic conditions drive dispersal success and distance. This is challenging, however, because detecting dispersal events in wild animals, especially over long distances, is notoriously difficult.
Here we address this in the Endangered purple-crowned fairy-wren, Malurus coronatus, a small cooperatively breeding songbird in which individuals can opt to delay natal dispersal, and we are able to consistently detect dispersal by colour-marked individuals, including over long distances. Thus, an a..., , , # Climate, habitat and demography predict dispersal by an endangered bird in a fragmented landscape

[https://doi.org/10.5061/dryad.6t1g1jx95](https://doi.org/10.5061/dryad.6t1g1jx95)

## Description of the data and file structure

Long-term data on purple-crowned fairy-wren movement was collected, to analyse drivers of natal dispersal likelihood and distance.

### Files and variables

#### File: Data\_Teunissen\_JPE.xlsx

**Description:**

This file contains the data used to analyse drivers of natal dispersal likelihood and distance in purple-crowned fairy-wrens, as presented in Teunissen et al. 2025. Climate, habitat and demography predict dispersal by an endangered bird in a fragmented landscape. Journal of Applied Ecology.

The file contains two separate sheets:

* \"Dispersal likelihood\" - Data file used to analyse the effect of habitat, climate and demography on individual purple-crowned fairy-wrens' likelihood to disperse from their natal territory to a dominant breeding position....