Key Identification Features
- Outside of small isolated groups, their broad overall range is divided into four geographically distinct population zones, each holding one or more recognized subspecies: the subspecies E.
- Females and non-breeding males do not have this distinct neck pattern, and females have darker markings on their underbody than males.
- Both sexes are usually silent, but males produce a distinctive "raspberry-blowing" call transcribed as prrt.
- Denham's bustard has paler grey colouring on the face and front neck, a browner nape, and distinctive black and white crown stripes on its head, which Ludwig's bustard lacks.
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