Male cockatiels whistles, brighter red patch on the cheek, has higher cock feather. but young male around 2mos old still resembles that of a female. Female on the other hand, has direct opposite of the male, dull color, shorter cock feathers, they usually whistle but less or no more especially if they had opposite sex with them and they might feel something is wrong. breeding them is easy, just a quiet environment, proper diet and sunlight. thats how i do it before they breed.

pictures....

can cockatiels be free flighted?

i think it can be free flighted.. i think any birds can be free flighted as long as it is trained...

depend talaga sa bird, kahit handfed may masama pa rin ugali, may hindi handfed pero mabait hehehe

BTW, cockatiels can not be freeflighted, they are "straight flyers". When released their natural tendency is to fly straight, so they cannot be trained to return. I was able to read this in some cockatiel article, besides, I have never heard of a freeflight trained cockatiel.

it depends on training and the skills of the birds,... I had this specific tiel na kaya magshift ng direction kahit airborne siya madalas nga lang sa head ko nagpeperch ung albino na nasa set of pics na pinost ko siya yoon, and yoong height ng lipad niya di tumataas ng 5 ft, pero fully flighted feather cxa and matured tiel na cxa and I also sold one tiel na may inborn skills na nagfree flight yoong 5th and 6th pics yoong pearlpied kapatid yoon ng albino kaya din niya magshift and kapag nasalabas siya ng cage pagtinawag ng amo niya lumilipad papunta sa kaniya... try ko hiramin yoong video na pinakita 3 days after makuha sakin yoong ibon...