National Geographic : 1951 Jun
© National Geographic Society 796 ioaacnlromes by Artnur A.Allen Never a Housing Shortage Here. These Versatile Artisans Use Plant Fibers as Building Blocks Avid insect hunters, these homemakers help preserve the balance of Nature. Phoebes (upper left) are named for their call, "Fee-bee! Fee-bee!" Oven-bird (upper right) sings. "Teacher! Teacher !"-hence the synonym, teacher bird. Mourning warbler (lower left) does not grieve; she's happy with herfour beautiful eggs. Magnolia warbler (right) prefers spruce tree to magnolia.