Campylopterus largipennis

Lopes, Leonardo Esteves, Vasconcelos, Marcelo Ferreira De & Gonzaga, Luiz Pedreira, 2017, A cryptic new species of hummingbird of the Campylopterus largipennis complex (Aves: Trochilidae), Zootaxa 4268 (1), pp. 1-33 : 23

Key to the species of the Campylopterus largipennis complex

1 Light tail tips (LTTs) greyish and short (sum of the length of the LTTs of the three outermost rectrices is ± 34 mm).................................................................................................... C. obscurus

1’ LTTs pure white and long (sum of the length of the LTTs of the three outermost rectrices is Ż 42 mm)................... 2

2 Basal half of outer rectrices bright bluish black................................................... C. largipennis

2’ Basal half of outer rectrices bright bronze green.............................................................3

3 Larger (body weight generally above 7.5 g); LTTs proportionally shorter (sum of the length of LTT-2 [from outside] and LTT-3 <44% wing length); rectrices usually broader and less pointed.................................... C. diamantinensis

3’ Smaller (body weight generally bellow 7.5 g); LTTs proportionally longer (sum of the length of LTT-2 [from outside] and LTT- 3>44% wing length); rectrices usually narrower and more pointed................................. C. calcirupicola