The Collaborative International Dictionary of English v.0.48:

Titlark \Tit"lark`\ (t[i^]t"l[aum]rk`), n. [Tit a small bird +
   lark.] (Zool.)
   Any one of numerous small spring birds belonging to Anthus,
   Corydalla, and allied genera, which resemble the true larks
   in color and in having a very long hind claw; especially, the
   European meadow pipit (Anthus pratensis).
   [1913 Webster]

WordNet (r) 3.0 (2006):

titlark
    n 1: a songbird that lives mainly on the ground in open country;
         has streaky brown plumage [syn: pipit, titlark, lark]