SWALLOW-LIKE TYRANT 149 
rufous, with dark lines on throat and bosom. The 
chestnut hue in the female is paler and mixed with 
grey. 
SWALLOW-LIKE TYRANT 
Fluvicola albiventris 
Above black; front half of head, narrow band across the rump, 
and slight edgings to wing-coverts and outer secondaries white ; 
below white ; bill and feet black; length 5.5 inches. 
Tuts small black-and-white Tyrant is not uncommon 
in the marshes and on the river-margins in the Plata 
district, its spring migration extending south to 
Buenos Ayres. Like the Kingfisher, it haunts the 
waterside and is found nowhere else. It has a shy, 
retiring disposition, concealing itself in the close 
thickets overhanging a stream, so that one does not 
often see it, notwithstanding its conspicuous white 
plumage. When disturbed it emits a series of low 
ticking notes, or darts swiftly out from the thicket, 
showing itself for a moment over the water before 
disappearing once more into a hiding-place. When 
thus seen darting above the surface it has a strikingly 
Swallow-like appearance. 
D’Orbigny says it makes a purse-shaped nest, of 
slender twigs, moss, and feathers neatly interlaced, 
and lays four white eggs, spotted at the large end with 
brown. 
