The mate of the stolen bird went off and in a few days came back with another mate. The box was too good to give up, so both the birds went to work to make it safe against the nest robber. They built up a wall of mud before the too handy back door. The egg thief could not get in without breaking down the wall, and he was ashamed to do that. So the birds kept their pleasant home, and reared their family there. FOOTNOTE: [13] See Appendix, 12. XV THE TANAGER FAMILY (_Tanagridæ_)[14] THIS is a large family of between three and four hundred species, all dressed in gay colors. But we have only three of them in our country. Their home is in the warmer parts of the world. We have the scarlet tanager in the East, the Louisiana tanager in the West, and the summer tanager in the South. Tanagers are a little larger than sparrows, and live in the trees. They feed on insects and fruit; sometimes, it is said, on flowers. The SCARLET TANAGER is the brilliant red bird with black wings and tail, common all over the Eastern and Middle States. His mate is dressed in modest olive green, and the nestlings are like her the first year. The tanager himself wears his gay dress only during the nesting season, that is, spring and summer. Towards fall he turns from scarlet to green like his mate, and he is a droll-looking object while he does it. He seems to break out into green patches or streaks. One that I watched began by showing a little green feather among the red on each side of his breast. I have seen one with a green ring around the neck, and all the rest of the plumage scarlet; and another with a green stripe down the back. Some show no regularity about it, but are covered with green patches all over, and look like bunches of colored rags. [Illustration: SCARLET TANAGER] It is no wonder that a bird hides in the woods, as many do, when changing his coat, if he looks such an object. In spring he gets back his brilliant coat, and comes to our Northern woods again, to nest. The nest of this bird is not very high in a tree. It is a rather shabby affair, that looks as if it would fall to pieces, and the birds are madly shy about being looked at. I once saw in the woods a tanager building her nest. I hoped to watch her through nesting, and see how she brought up her little folk. Both of the pair were there, but were too shy to come to the nest while my friend and I were there. We kept very still, and even hid in some bushes, hoping she would not see us. We were so quiet that she was gradually getting over her fright, and coming nearer the nest, when suddenly the big dog we had with us gave a loud sneeze. In an instant both birds were off, as if shot out of a gun. And I think they never came back, for the nest was not finished.