They probably knew you were there, thats why they hung up.
If they start calling, then they know something is up.
If you just stay put.... but change your calling, like wait 10 mins, then call really softly but urgently, they may come sneaking in to see whats up.
The best thing you could have done, would have been to howl back at them.
Excited short howls and young coyote barks and yips.
That will fool those other coyote into thinking that there ACTUALLY WAS a dying animal.... and they just missed out, but they'll be pissed that another nieghboring pack came in and got the kill.
They'll come charging in to steal it, or sneaking in to find scraps.
Not that you guys have probably mastered coyote howling..... its a bit tough to get good at.
My advice go pick up some calling videos from primos or something like that.
They would have great examples of coyotes hangin up and what to do with them.
