Olive Sparrow vs Clay-coloured Sparrow

To distinguish between the Olive Sparrow and the Clay-colored Sparrow, focus on the bill and plumage. The Olive Sparrow has a thicker, more conical bill and a more uniform olive-green back, while the Clay-colored Sparrow has a slimmer bill and distinctive facial markings with a paler overall appearance.

1. Bill Shape: Olive Sparrow has a thicker, more conical bill compared to the slimmer bill of the Clay-colored Sparrow. 2. Back Color: Olive Sparrow shows a uniform olive-green back, while the Clay-colored Sparrow is paler with streaks. 3. Facial Markings: Look for the distinct facial pattern in the Clay-colored Sparrow, including a gray nape and buffy supercilium, absent in the Olive Sparrow.

The Olive Sparrow features a more uniform olive-green back and lacks the distinct facial markings of the Clay-colored Sparrow. In contrast, the Clay-colored Sparrow displays a pale, streaked appearance with a clear facial pattern, including a gray nape and a buffy supercilium.