Colorado bloodsucking insects?

Question

the insect looks like a bee and also a fly and it was filled with my blood from where it bit me

Answer 1

Please check up. Are these links have anything common with your flying insects???

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1. Spot.colorado.edu/~mitton/Cliff Swallows.htm  

... relatives of the blood-sucking bedbugs that parasitize humans, ... When insects disappear for the winter, cliff swallows migrate to South America to find ...

http://spot.colorado.edu/~mitton/Cliff%2...

2. A Guide to the Twenty Nine Insect Orders  

Photo: © Whitney Cranshaw, Colorado State University, Bugwood.org ... Flying Insects. Non-Insect Arthropods. Identify an Insect. Learning About Insects ...

http://insects.about.com/od/insects101/t...