Food-Preference-Based Ladybird Identification

I usually group the ladybird species that I catch according to the food preference in order to identify them. However, there are many ways to identify ladybirds based on some other characteristics. But to me, grouping and identifying them based on food preference arethe easiest ways. Here is how I do it according to the article by Frank & Mizell (University of Florida IFAS Extension):

a) Plant Feeding ladybird (Phytophagous) : Epilachninae
b) Mildews (Fungus) Eating ladybird
c) Predatory Ladybird :
1) Feeding on Aphids
2) Feeding on Whiteflies
3) Feeding on Mites
4) Feeding on Cottoncushion Scales
5) Feeding on Mealybugs
6) Feeding on Scale and Armored Scale Insects

Remember also that ladybird has its own natural enemies like birds, spiders and its own kind. Pathogenic bacteria are also its potent enemy.