else will elaborate more.
What species / subspecies are being kept?
all of them are kept except for the reticulated because it is illegal to have them in captivity, although C. collaris seems to be more available than the others
What morphs are out there (natural occurring vs captive bred morphs)?
someone else can probably answer this better but there are aquaflames, yellowheads, texas flames and just good old brown ones of the collaris
Is the bulk of Collared Lizards being kept coming from captive bred stock or wc? except for the ones i hatched, i think all mine were WC
What about related species like the Leopard Lizards?
i don't know anything about leopards
What has proven to be the most successful captive diet and how much?
gut loaded bugs with some calcium coating, i let my guys eat what they want some people can gets theirs to eat veggies, my guys don't
Is there a clearing house for husbandry information?
not sure what you mean by clearing house but i have never seen a book on them in a store.
most of the info, i get from online, forum and places like suncharmers.com (go to FAQ) and
http://www.reptileallsorts.com/colliz-cs.htm
hope that helps a little
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vonnie
***The first law of dietetics seems to be: if it tastes good, it's bad for you. — Issac Asimov ***