National Geographic : 1944 Jun
A Bag of Bird Portraits © National Geographic Society jxoaacnrome Dy Artnur A. Alien A Sennett's Oriole Home along the Rio Grande, Cunningly Concealed in Spanish Moss The plain blue egg among the speckled ones was laid by a Red-eyed Cowbird. To obtain this picture Professor Allen exposed the eggs by parting the moss. The Oriole (female), which has not detected the fraud, can't decide whether to enter by the large new door or to slip in the old way. It finally decided on the latter.