Lark adaptation to survive dust- & sandstorms & cold:

Skylark Alauda arvensis nostrils loosely covered by thin black bristles which may have a more feather-like basis;

   North African Short-toed Lark Calandrella brachydactyla hermonensis Syn rubiginosa  have tufts covering nostrils only;

   Steppe Lesser Short-toed Lark Calandrella rufescens heinei  have two rows of tufts: one covering nostrils and one covering gape.