Spotted Thick-knee vs Water Thick-knee

In short

The Spotted Thick-knee and Water Thick-knee are similar in structure but can be distinguished by their plumage and habitat preferences. The Spotted Thick-knee has more prominent spots on its upperparts, while the Water Thick-knee has a more uniform appearance with less distinct markings. Both species are nocturnal and have similar calls, making visual identification more reliable.

Identification tips

1. Look for the distinct black spots on the Spotted Thick-knee's upperparts. 2. Observe the habitat: Spotted Thick-knee is more likely in dry, open areas, while Water Thick-knee is near water. 3. Note the uniformity of the Water Thick-knee's plumage compared to the more patterned Spotted Thick-knee. 4. Use vocalizations as a secondary cue, as they are similar.

Size

Both species are similar in size, typical of thick-knees, with no significant difference in overall body length or bulk.

Plumage

The Spotted Thick-knee has distinct black spots on its upperparts and wings, giving it a more patterned appearance. In contrast, the Water Thick-knee has a more uniform brownish-grey plumage with less prominent markings, especially on the wings.

Behaviour

Both species are primarily nocturnal and tend to be secretive during the day. They are often seen standing still or moving slowly, making them difficult to spot.

Habitat

The Spotted Thick-knee is typically found in dry, open habitats such as savannas and grasslands. The Water Thick-knee prefers habitats near water bodies, such as riverbanks and lakeshores, which can be a key differentiator in the field.

Voice

Both species have similar vocalizations, consisting of loud, wailing calls, often heard at night. There are no significant differences noted in their calls that would aid in field identification.