Prey consumed by wading birds in mangrove swamps of the Caribbean coast of Colombia Author Ruiz-Guerra, Carlos Author Echeverry-Galvis, María Ángela text Journal of Natural History 2019 2019-10-07 53 29 1823 1836 journal article 10.1080/00222933.2019.1667037 1464-5262 3662889

Table 2. Prey composition of regurgitations from Snowy Egrets and Tricolored Herons, captured using percentage values of the number (N), weight (W), frequency of occurrence (FO) and index of relative importance (IRI).

		Snowy Egret (N = 17)				Tricolored Heron (N = 21)
Item		%FO	%N	%W	%IRI	%FO	%N	%W	%IRI
Poecilidae	Guppies	64.71	57.97	55.99	76.22	85.71	67.61	77.90	86.08
	Gambusias	23.53	1.81	0.11	0.69	52.38	23.10	5.65	10.39
Engraulidae	Anchovies	11.76	2.90	7.59	1.32	-	-	-	-
Eleotridae	Eleotrids	35.29	5.43	33.39	15.74	19.05	1.41	13.07	1.90
Rivulidae	Rivulines	11.76	8.70	1.91	1.33	28.57	2.54	2.59	1.01
	Unidentified fishes	5.88	0.36	0.67	0.06	4.76	0.56	0.33	0.03
Aeshnidae	Dragonflies	11.76	0.72	0.01	0.09	4.76	0.28	0.01	0.01
Isopoda	Isopods	17.65	22.10	0.03	4.54	19.05	3.66	0.46	0.54
Grapsidae	Mangrove tree Crabs	-	-	-	-	4.76	0.85	0.01	0.03