Question: what does Sinbad and Sergeant Stubby have in common?

<P0-S0> Kingfishers or Alcedinidae are a family of small to medium-sized, brightly colored birds in the order Coraciiformes. <P0-S1>  They have a cosmopolitan distribution, with most species found outside the Americas. <P0-S2>  The family contains 114 species and is divided into three subfamilies: river kingfishers (Alcedininae), tree kingfishers (Halcyoninae), and water kingfishers (Cerylinae). <P0-S3>  All kingfishers have large heads, long, sharp, pointed bills, short legs, and stubby tails. <P0-S4>  Most species have bright plumage with only small differences between the sexes. <P0-S5>  Most species are tropical in distribution, and a slight majority are found only in forests. <P0-S6>  They consume a wide range of prey usually caught by swooping down from a perch. <P0-S7>  While kingfishers are usually thought to live near rivers and eat fish, many species live away from water and eat small invertebrates. <P0-S8>  Like other members of their order, they nest in cavities, usually tunnels dug into the natural or artificial banks in the ground. <P0-S9>  Some kingfishers nest in arboreal termite nests. <P0-S10>  A few species, principally insular forms, are threatened with extinction. <P0-S11>  In Britain, the word "kingfisher" normally refers to the common kingfisher. <SEP> <P1-S0> Sinbad (c. 1937 – 30 December 1951) was a mixed-breed dog that was one of two animals to be classified as non-commissioned officers by an arm of the United States military, rather than property, prior to the enactment of regulations to prohibit such (the other being Sergeant Stubby USA, WWI) after being enlisted by the creative crew of USCGC "Campbell" . <P1-S1>  Prior to and after an official retirement, Sinbad was assigned the rank of K9C or "Chief Dog" - equivalent to Chief Petty Officer. <P1-S2>  At the time of the biography written by George Foley, no other member of the United States Coast Guard had yet been the subject of a published biography. <P1-S3>  Sinbad spent 11 years at sea on the "Campbell" including combat in World War II that became widely publicized as part of the homefront campaign. <SEP> <P2-S0> Bishop Walden Perkins (October 18, 1841June 20, 1894) was a United States Representative and Senator from Kansas. <P2-S1>  Born in Rochester, Ohio, he attended the common schools and Knox College (Galesburg, Illinois). <P2-S2>  He prospected for gold through California and New Mexico from 1860 to 1862 and served four years in the Union Army during the Civil War as sergeant, adjutant, and captain. <P2-S3>  He studied law in Ottawa, Illinois and was admitted to the bar in 1867, commencing the practice of law in Princeton, Indiana. <P2-S4>  He moved to Oswego, Kansas and continued practice; he was a local county attorney for the Missouri, Kansas & Texas Railroad for two years and prosecuting attorney of Labette County in 1869. <P2-S5>  He was a judge of the probate court of Labette County from 1870 to 1882, and became editor of the "Oswego Register" in 1873. <SEP> <P3-S0> Sergeant Stubby (1916 or 1917 – March 16, 1926) was a dog who was the official mascot of the 102nd Infantry Regiment (United States), assigned to the 26th (Yankee) Division. <P3-S1>  He served for 18 months and participated in seventeen battles on the Western Front. <P3-S2>  He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and once caught a German soldier by the seat of his pants, holding him there until American soldiers found him. <P3-S3>  Back home, his exploits were front page news in major newspapers.