Real Name: Choi Jun Hong

Stage Name: Zelo

Bunny: Blue

Nickname: 15-Year Old Genius

Position: Maknae, Rapper & Dancer

Birth Date: October 15, 1996

Height: 182 cm

Weight: 63 kg

Specialty: Rap, dance, beatbox

Facts: His ideal type of woman is S.E.S’s Yoojin

Twitter: https://twitter.com/#!/zelo96

Real Name: Moon Jong Up

Stage Name: Jongup

Bunny: Green

Nickname: Dance Shindong

Birth Date: February 6, 1995

Height: 176 cm

Weight: 66 kg

Position: Sub-Vocalist & Main Dancer

Twitter: https://twitter.com/#!/BAP_Jongup

Twitter: 

Real Name: Yoo Young Jae

Stage Name: Youngjae

Bunny: Yellow

Nickname: Brain

Position: Main Vocalist

Birth Date: January 24, 1994

Height: 178 cm

Weight: 65 kg

Twitter: https://twitter.com/#!/BAP_Youngjae

Twitter: 

Real Name: Jung Dae Hyun

Stage Name: Daehyun

Bunny: White

Nickname: Busan’s Won Bin

Position: Lead Vocalist

Birth Date: June 28, 1993

Height: 177 cm

Weight: 63 kg

Hometown: Busan

Twitter: https://twitter.com/#!/BAP_Daehyun

Birth Name: Kim Him Chan

Stage Name: Himchan

Bunny: Pink

Nickname: Instrument Ulzzang

Position: Sub-Vocalist, Rapper

Birth Date: April 19, 1990

Height: 180 cm

Weight: 69 kg

Twitter: https://twitter.com/#!/Himchanchan

Real Name: Bang Yong Gook

Stage Name: Yongguk

Bunny: Red

Artistic Name: Jepp Blackman

Nickname: Inversion Rapper

Position: Leader & Main Rapper

Birth Date: March 31, 1990

Height: 182 cm

Weight: 60 kg

Education: KyungHee Cyber University

Hobbies: Baseball, basketball, playing by himself

Special Talents: Writing songs and lyrics

account twitter: https://twitter.com/#!/realjepp

I get confused too at first. but now I can a little bit distinguish them. 

I will post B.A.P member profile (with their pic). Hope I help you well :)