Williamson's sapsucker _Sphyrapicus thyroideus_ Wilson's [common] snipe _Capella gallinago delicata_ Winter wren _Troglodytes troglodytes_ Woodcock _Scolopax rusticola_ Wood thrush _Hylocichla mustelina_ Worm-eating warbler _Helmitheros vermivorus_ Wrentit _Chamaea fasciata_ Yakutat fox sparrow _Passerella iliaca annectens_ Yellow-billed cuckoo _Coccyzus americanus_ Yellow-billed loon _Gavia adamsii_ Yellow-headed blackbird _Xanthocephalus xanthocephalus_ Yellow palm warbler _Dendroica palmarum hypochrysea_ Yellow warbler _Dendroica petechia_ Appendix II--_Bird Banding_ Frequent reference has been made in this bulletin to bird banding as a means for obtaining information on the migrations and life histories of birds. Since 1920 this work in North America has been under the direction of the Fish and Wildlife Service in cooperation with the Dominion Wildlife Service of Canada. Each year birds to the number of a quarter of a million or more may be marked with numbered bands. As anyone interested in birds, either game or nongame, may have a marked individual come into his hands, there are several pertinent details that should be remembered if the recovery record is to have maximum value in advancing the science of ornithology. 1. The reporting letter should be addressed to: Bird Banding Office, Patuxent Research Refuge, Fish and Wildlife Service, Laurel, Md. 2. In the letter print the full number of the band, including the series designation and the serial number. The series designation may be a single letter or a two- or three-digit number and may be stamped to the left or over the serial number. The series designation, if a number such as "48" or "50," is not a date and should not be so interpreted. Full numbers are correctly written as: A-678901; 48-345920; 141-543678; 20-167; 496-00517; etc. 3. If the bird is alive and uninjured, read the number carefully without removing the band, and release the bird. It may be reported again. If it is dead, remove the band and, after flattening it out, attach it to the letter with scotch tape or surgical adhesive tape. Should it be desired as a souvenir, it will be returned upon request. 4. Give in the report the exact date, the location (town, county, State, etc.) and the manner in which the bird was obtained, that is, whether it was shot, found dead, trapped, etc. 5. Print your own name and permanent address clearly on the letter. 6. Keep a record of the band number and refer to it should there be any subsequent correspondence about it with the Service. The number is always the clue to any record of a banded bird.