Thekla Lark is slightly smaller than Crested Lark, but both are very close and have cryptic plumage. Breast, chin, throat and neck sides are conspicuously streaked dark brown, and contrast strongly with the creamy-white under parts. The broad collar made with dark spots extends from neck to nape, and make easier to recognize the species. Upperparts are brown streaked darker brown. It has shorter and narrower wings. Under wing is pale grey, almost white. On the head, crown and nape are brown, finely spotted with darker brown. It has a fairly long creamy-white eyebrow. Head sides show brown markings. The brown erect crest of Thekla Lark is shorter, and appears like a fan. Bill is shorter, broader and stronger, with lower mandible more convex. Eyes are brown. Legs and feet are flesh-colored. Both sexes are similar. Juvenile is duller, with dark brown-spotted plumage giving scaly effect. Crest is shorter than in adults. Thekla Lark has less varied and melodious calls. Phrases are shorter, harder and metallic. There are less flute-like sounds.