| Release Date | January 1, 1977 | |
|---|---|---|
| Status | Released | |
| Original Title | Proč jsou na obloze draci | |
| Runtime | — | |
| Budget | — | |
| Revenue | — | |
| Language | Czech | |
| Original Language | Czech | |
| Production Countries | Czechoslovakia | |
| Production Companies | Krátký film Praha – Studio Jiřího Trnky | |