Birds of a feather flock together
okeː toːkakaːjalu
In Telugu ఒకే తోకకాయలు.
This Telugu phrase, though not a direct translation, conveys the idea of people with similar characteristics associating with each other.
Example
"వాళ్ళు ఎప్పుడూ కలిసే ఉంటారు, ఒకే తోకకాయలు."