The nest of the Calandrelle is carelessly constructed, but very safely concealed from view; the eggs are grey or pale yellow, marked more or less distinctly and very variously with reddish brown. At the commencement of September the annual migrations of these Larks have fully commenced, and flocks of them may be seen winging their way in immense masses towards the wooded steppes of Central Africa, literally forming clouds that obscure the sky, or when they alight covering the entire ground, very frequently for half an hour at a time. Jerdon mentions their appearance in India in very similar terms, and tells us that on one occasion he brought down no fewer than twelve dozen of these birds with two shots from a double-barrelled gun—a statement for the truth of which we can fully vouch after our own experiences in Central Africa. Thousands are also destroyed in Spain, but the increase is so large as to prevent any serious diminution of their numbers.
The BLACK LARKS (Saxilauda) form a group very closely resembling the Calandra Larks, but recognisable by the peculiarity of their plumage and the Finch-like form of their beaks.
THE BLACK LARK.
The Black Lark, or Moor Lark (Saxilauda Tatarica), is about seven and a half to eight inches long, the wings five and a half, and the tail three inches. The coat of the old male bird is coal-black, shaded, after moulting, with white, both upon the back and lower portion of the body; indeed, at that time the plumage may almost be described as chequered, each feather having a white border, which gradually wears away as the season advances. The beak is yellow, tipped with a dark shade, the feet brown, and the eyes light brown. The coat of the female is brown, marked with a deeper tint, the under portion of the body being white: the young resemble the mother. Swarms of these Moor Larks are found inhabiting the steppes of Central Asia, where they frequently linger from year's end to year's end, never leaving except to wander to somewhat higher ground, in search of a spot upon which they can escape the snow that drives them from the lower parts of the country. Eversmann tells us that he saw them in large flocks upon the Asiatic steppes during the winter, but with the particulars of their summer life in Asia we are entirely unacquainted, except that the seeds of various plants and insects constitute their favourite food. As to its general habits, this species closely resembles the Calandra Lark, with which it frequently associates. The brood consists of from four to six pale blue eggs, marked with reddish spots; the nest exhibits but small trace of care in its construction.
We must here again call our readers' attention to the admirable manner in which the colours of the feathered tribes are adapted to the particular situations in which their life is to be passed. Seeing that the Black Larks could only exist where the soil is of a similarly dark character, another race of these birds has been appointed to cheer the barren desert with their presence, coloured so as to harmonise and blend with the light and sandy plains that they frequent; such are—
The SAND LARKS (Ammomanes), easily recognisable by their strong beaks, very powerful, broad, long, and pointed wings, comparatively large and excised tail, and sand-coloured plumage; all the various species closely resemble each other in these particulars.