Figure 2

On-effort single-species sightings of (a) Australian humpback dolphins (Sousa sahulensis) and (b) Indo-Pacific bottlenose dolphins (Tursiops aduncus), and (c) mixed-species sightings of both species, as well as (d) overall presence-absence of the species in 540 grids of 500 × 500 m distributed around the North West Cape, Western Australia, from six years of surveys (2013–2015, 2018–2019, and 2021).