The General Stud Book, 1873, Vol.12, p.520 (BIRDCAGE - was covered 1872 by OREST > SONGSTER; death colt by OREST 1874, 1875 colt by him, missed to OREST and WILBERFORCE 1876); Was sold to Austro-Hungarian Monarchy (Austrian Empire) in 1878. Barren 1878 by OREST, covered by OSTREGER 1879 (filly) ; 1880 covered by BUCCANEER (colt); 1881 covered by PRZEDSWIT, barren 1882, 1883 not covered, 1884 covered by VERNEUIL (filly BABAM); no more books online;