April. At San Diego they nested later, about April 20. He speaks of their singing as an attempt at a song, the notes being harsh, like those of a Jay, but not imitative. They catch birds, but do so very rarely, depending upon grasshoppers and other insects.
The nests of the excubitoroides, so far as I have had any opportunity to examine them, always exhibit a very marked contrast, in the elaborateness of their structure, to any of the ludovicianus that have fallen under my notice. They resemble those of the borealis in their size and the felted nature of their walls, but are more coarsely and rudely put together. They have an external diameter of about eight inches, and a height of four. The cavity is also large and deep. These nests are always constructed with much artistic skill and pains. The base is usually a closely impacted mass of fine grasses, lichens, mosses, and leaves, intermingled with stout dry twigs. Upon this is wrought a strong fabric of fine wood-mosses, flaxen fibres of plants, leaves, grasses, fur of quadrupeds, and other substances. Intertwined with these are a sufficient number of slender twigs and stems of plants to give to the whole a remarkable strength and firmness. This is often still further strengthened by an external protection woven of stouter twigs and small ends of branches, stems, etc. The whole is then thoroughly and warmly lined with a soft matting of the fur of several kinds of small animals, vegetable down, and a few feathers.
The eggs, five or six in number, measure 1.00 by .73 of an inch, and strongly resemble those of both the borealis and the ludovicianus. Their ground-color is pale greenish-white, over which are marks and blotches, more or less confluent, of lilac, purplish-brown, and light umber.
Mr. Ridgway, who is familiar with this bird in Southern Illinois, informs me that in that section it is a resident species, being abundant during the summer and by no means rare in the winter. It is there, strangely enough, often called the Mocking-Bird, its similar appearance and fondness for the same locality leading some persons to confound these very different birds. In districts where the true Mimus is not common, young birds of this species are frequently taken from their nests and innocently sold to unsuspecting admirers of that highly appreciated songster.
This bird inhabits, almost exclusively, open situations, being particularly fond of waste fields where young honey-locusts (Gleditschia triacanthos) have grown up. Among their thorny branches its nests are almost utterly inaccessible, if beyond the reach of poles. In such localities this bird may often be seen perched in an upright position upon some thorn-bush, or a fence-stake, quietly watching for its prey, remaining nearly an hour at a time motionless except for an occasional movement of the head.
The flight of this bird, Mr. Ridgway adds, is quite peculiar, utterly unlike that of any other bird except the Oreoscoptes montanus, which it only slightly resembles. In leaving its perch it sinks nearly to the ground, describing a curve as it descends, and, passing but a few feet above the surface, ascends in
the same manner to the object upon which it is next to light. The flight is performed in an undulating manner, the bird sustaining itself a short time by a rapid fluttering of the wings, and sinking as this motion is suspended. As it flies, the white patch on the wing, with the general appearance of its gray and white plumage, increases its resemblance to the Mocking-Bird.
Though very partial to thorn-trees (honey-locust), other trees having a thick foliage—as those canopied by a tangled mass of wild grapevines—are frequently occupied as nesting-places; while a pair frequently make their home in an apple-orchard, selecting the old untrimmed trees. The situation of the nest varies according to the character of the tree; if in a thorn-bush, it is placed next the trunk, encased within protecting bunches of thorns; but if in an apple-tree, it is situated, generally, near the extremity of a horizontal branch. The number of eggs is generally six, but Mr. Ridgway has several times found seven in one nest. No bird is more intrepid in the defence of its nest than the present one; at such times it loses, apparently, all fear, and becomes almost frenzied with anger, alighting so near that one might grasp it, were he quick enough, and with open mouth and spread wings and tail threatening the intruder, its attacks accompanied by a peculiar crackling noise, interrupted by a harsh, grating qua, qua, qua, slowly repeated, but emphatically uttered.
The habit peculiar to the Shrikes of impaling their victims Mr. Ridgway has observed frequently in this species; for this purpose the long and extremely sharp thorns of the honey-locust serve it admirably; and “spitted” upon them he has found shrews, mice, grasshoppers, spiders, and even a Chimney-Swallow (Chætura pelagica); and, in another instance, but upon the upright broken-off twig of a dead weed in a field, a large spider. He has also known this bird to dart at the cage of a Canary-Bird, and frighten the poor inmate so that it thrust its head between the wires, when it was immediately torn off by the powerful beak of the Butcher-Bird.
The young of this species becomes a very pleasing and extremely docile pet. Mr. Ridgway has known one which, though fully grown, with power of flight uninjured, and in possession of unrestrained freedom, came to its possessor at his call, and accompanied him through the fields, its attachment being rewarded by frequent “doses” of grasshoppers, caught for it. It had been fully feathered before taken from the nest. Unfortunately the vocal capabilities of this Shrike are not sufficient to allow its becoming a general favorite as a pet; for, although possessing considerable talent for mimicry, it imitates only the rudest sounds, while its own notes, consisting of a grating, sonorous qua and a peculiar creaking sound, each with several variations, are anything but delightful.