Tracklist
| Hell Hound |
| Hummingbird |
Versions
| Category | Artist | Title (Format) | Label | Category | Country | Year |
|---|---|---|---|---|---|---|
| S 5176 | Duffy Power | Hell Hound / Hummingbird (7", Single, Promo) | CBS | S 5176 | UK | 1970 |
| 5-10650 | Duffy Power | Hellhound (7", Single) | Epic | 5-10650 | US | 1970 |
| 5-10650 | Duffy Power | Hellhound (7", Single, Promo) | Epic | 5-10650 | US | 1970 |
| EPC 7139 | Duffy Power | Hummingbird (7", Single, Promo) | Epic | EPC 7139 | UK | 1971 |
