Editing Behavioral ecology (section)

====Female desertion and sex role reversal====
In birds, desertion often happens when food is abundant, so the remaining partner is better able to raise the young unaided. Desertion also occurs if there is a great chance of a parent to gain another mate, which depends on environmental and populational factors.<ref>{{cite journal | last1 = Beissinger | first1 = S. R. | last2 = Snyder | first2 = N. F. R. | year = 1987 | title = Mate desertion in the snail kite | journal = Animal Behaviour | volume = 35 | issue = 2| pages = 477–487 | doi=10.1016/s0003-3472(87)80273-7| s2cid = 53192930 }}</ref> Some birds, such as the phalaropes, have reversed sex roles where the female is larger and more brightly colored, and compete for males to incubate their clutches.<ref>(Reynolds)</ref> In jacanas, the female is larger than the male and her territory could overlap the multiple territories of up to four males.<ref>{{cite journal | last1 = Butchart | first1 = S. H. M. | last2 = Seddon | first2 = N. | last3 = Ekstrom | first3 = J. M. M. | year = 1999b | title = Yelling for sex: harem males compete for female access in bronze-winged jacanas | journal = Animal Behaviour | volume = 57 | issue = 3| pages = 637–646 | doi=10.1006/anbe.1998.0985| pmid = 10196054 | s2cid = 24253395 }}</ref> In the frog species ''[[Bibron's toadlet|P. bibronii]],'' the female is fertilizes multiple nests, and the male is left to tend to each nest while the female moves on.