Stellula
Literature
| Authors | Title |
Year of Publication |
|---|---|---|
| D.P. Armstrong | Economics of breeding territoriality in male Calliope Hummingibrds | 1987 |
| J.L. Atwood | Robbery of nesting materials by the Calliope Hummingbird | 1979 |
| G.T. Austin | Interspecific territoriality of migrant calliope and resident broad-billed hummingbirds | 1970 |
| K.B. Armitage | Territorial behavior in fall migrant Rufous Hummingibrds | 1955 |
| J. Berlioz | A new hummingbird hybrid. Calypte anna x Stellula calliope | 1930 |