As a general rule.....
Magazines have a spring. Fixed, detachable, tubular, blind box, etc., all have a spring that is used to feed cartridges.
Clips do not have a spring that feeds cartridges. They may be made of spring steel (enbloc, moon, half moon, etc.), they may actually be a spring, but they do not have a spring to feed cartridges. Some stripper clips have a "spring", a leaf type spring, used to tension cartridges, to keep them in the stripper clip (Mauser stipper clips, etc.), but the spring does not feed cartidges like the spring in a magazine.
As others have pointed out, "jungle clips" are spring steel clips for fastening two magazines together. They are an invention of a clever marketer, and were/are used by individuals who do not well understand the drawbacks of their use in actual combat. They are a "Hollywood" type gadget, impressive looks hiding severe flaws in both principle and execution. They have never been a US military issue item.