These little beasties are very hard to see but most often detected by looking very closely at flowers.
Two can be seen below sucking away at the flowers sap at the base of the petals to the left in the 8 o'clock position.
They have wings but these are barely discernible and featherlike.
This is one on a human knuckle, just to give an idea of how minute these things are.
Their activities cause silvering, mottling and streaking to leaves and causes distortions in flowers and fruits.
Below can be seen thrips damaged leaves in comparison with healthy leaves of the same species.
One or two can lead to many and so once again a systemic pesticide that is taken up by the plant must be used to eradicate these as soon as they are detected.
Damaged leaves do not repair themselves once the thrips have been eradicated so it is hard to tell if they are gone if the infestation got to the point where leaves were silvered or mottled.
It's best simply to vigilant and spot them before they have done major damage, as hard as that is.