According to Audubon, the Tyrant Shrike is one of the most attractive birds that visit the United States during the summer months. It appears in Louisiana about the middle of March, and occasionally remains until the middle of September, but the flocks for the most part proceed north before that season, and spread themselves over every part of the country, filling the air with their quivering shrill cry, as they explore the orchards, fields, or gardens, and fearlessly approach the dwelling-houses of mankind. As the breeding season draws near, they may be seen flying merrily about at some distance from the ground, in search of a convenient spot for building, the male constantly uttering his shrill note, and keeping quite close to his mate. The nest is formed of bits of cotton, wool, tow, or similar materials, and is usually of considerable size; the interior is neatly and thickly lined with fibres and horsehair; the four or six eggs have a reddish white shell, irregularly marked with brown streaks. No sooner is the brood laid than the male bird begins to exhibit the utmost courage and devotion in tending and protecting his partner. The entire day is occupied in feeding and entertaining her, as he perches close beside her on a twig, displaying his glowing crest and white breast in all its beauty to her admiring eyes. Should an enemy or rival approach, he darts furiously down and chases the intruder to a distance, sometimes as far as a mile from the nest, and then returns rapidly to his little family. So bold and fearless is the Tyrant Shrike upon these occasions, that even Falcons scarcely venture to approach its nest; and the cats of the neighbourhood, well knowing the reception they would meet with, carefully avoid trespassing within the domains of the intrepid father. "At this period," says Wilson, "the extreme affection of the Tyrant Shrike for his mate and young makes him suspicious of every bird that happens to pass near his residence, so that he attacks every intruder without discrimination. In the months of May, June, and part of July his life is one continued scene of broils and battles, in which, however, he generally comes off conqueror. Hawks, Crows, and Eagles all equally dread an encounter with this dauntless little champion, who, as soon as he sees one of the last approaching, launches into the air to meet him, and darts down on to his back, sometimes fixing there, to the great annoyance of the king of birds, who, if no convenient retreat be near, endeavours by various evolutions to rid himself of his merciless adversary. But the Tyrant Fly-catcher is not so easily dismounted; he teases the Eagle incessantly, charges upon him right and left, and remounts into the air, that he may descend on his enemy's back with greater force, all the while keeping up a shrill and rapid twittering, and continuing the attack sometimes for more than a mile, until he is relieved by some other of his tribe equally eager for the contest."