Flech or flae is the common name for ony o the wee wingless insects o the order Siphonaptera. Flechs is external parasites, leevin by hematophagy aff the bluid o mammals an birds.
Some weel kent flechs includes:
- Cat flech (Ctenocephalides felis),
- Dug flech (Ctenocephalides canis),
- Human flech (Pulex irritans),
- Northren ratton flech (Nosopsyllus fasciatus),
- Oriental ratton flech (Xenopsylla cheopis).
- Saund-lowper or sea-flech (Orchestia agilis)
