What adaptations to feeding are seen in insects?

Since this is not my area of expertise, I searched Google under the key words "insect feeding adaptation" to get these possible sources:

http://en.wikipedia.org/wiki/Herbivore_adaptations_to_plant_defense
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T79-49NXD71-2&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=9219ee5ca8d9a8942c49183ce8dcb6c4
http://www.blackwell-synergy.com/doi/pdf/10.1111/j.1365-2435.2006.01118.x?cookieSet=1
http://userwww.sfsu.edu/~biol240/labs/lab_04biotic/index.html
http://insected.arizona.edu/enforcers/background.html

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.

I hope this helps. Thanks for asking.

Insects have evolved a wide range of feeding adaptations to ensure their survival in various environments. Some common adaptations include:

1. Mouthparts: Insects display diverse mouthparts that are specialized for different types of feeding. For example:
- Chewing mouthparts: Insects like grasshoppers have strong mandibles for biting and chewing plant material.
- Piercing-sucking mouthparts: Mosquitoes and bedbugs have long, slender mouthparts that allow them to pierce the skin of their hosts and feed on blood.
- Sponging mouthparts: Butterflies have proboscises, long tubular structures for feeding on nectar from flowers.

2. Proboscis length: Insects like bees and butterflies have adapted with long proboscises to access nectar from deep flowers, maximizing their feeding opportunities.

3. Digestive adaptations: Insects have specialized digestive systems to extract nutrients efficiently from their food. Some insects, like termites, have symbiotic relationships with microbes in their guts that aid in the digestion of cellulose.

4. Feeding behavior: Insects have evolved various feeding strategies. For instance:
- Parasitic insects, such as fleas and lice, have adapted to live off the blood of a host organism.
- Herbivorous insects feed primarily on plant material and have adapted to digest the cellulose found in plant cell walls.

To understand more specific adaptations, one can study the anatomy, behavior, and ecological niches of different insect species. Additionally, consulting entomology textbooks, scientific literature, or online resources can provide further insight into the fascinating world of insect feeding adaptations.