OK in compost or womery in the quantities generated at the kitchen table. In very large quantities animal products may attract rodents and blow flies and stink as they rot down. The fats in some animal products, like butter, cream and roast drippings, actually coat compost particles cutting off the air supply so adding large amounts encourages the smellier anaerobic form of decomposition.
Annuals (spent). Eg. Forget-me-nots.
Watch out with these as they may have viable seeds. Check with your nursery as to whether they are likely to self seed or not. If they are and you don't want them popping up every where (some people might!), treat them like weeds and drown them.
Apple peels and cores. For nitrogen.
Great in a wormery or hot or cold heap. Large pieces of fruit (such as whole apples) should be chopped roughly before being added.
Aquatic weeds. For nitrogen.
Suitable in a wormery or hot or cold heap.
Ashes.
Ashes from chemically treated wood or glossy magazines are not suitable at all for wormeries and should be added very sparingly to compost heaps. Tends to be alkaline so will increase the pH of the heap. Coal-ash should be avoided.
Autumn leaves. For carbon.
Suitable in hot or cold heaps. Be careful to make sure they are well mixed in as leaves have a tendency to mat together and in so doing resist decomposition.
Wormeries 
Copyright Westcountry Worms 2006