J.P. Myers 1974 Flocks (1974) Estancia Medalu, 35 km S. of Juncal by road, Pte de Madariaga, Pcia de Bs.As., Argentina. 26 September (Early) 1837 - 15 Tryngite going into roost 1838 - 1 Tryngite going into roost 1840 - 2 Pluvialis IUL = 80 ft. 2 Pluvialis going into roost 1842 - 6 Pluvialis going in 1845 - Sun on horizon. - roosting flock appears to segregate by species. Peck's going towards H2O. 1846 - roosting flock spread considerably (has been going on for some time). area 50 m wide 1847 - 5 Tryngite, 5 Pluvialis going in 1848 - 2 Pluvialis, 5 fuscicollis 1849 - 2 fuscicollis, 5 Pluvialis 1850 - a tremendous flock of Pluvialis approaching from WNW. nearby (to car) territorial Pluvialis flying in. Over 200+ Pluvialis going in now. IUL = 50 ft 1855 - 5 prep. IUL = 20 ft ' 10 Pluvialis 1856 - buffies using drier area, sensing to forage. 1910 - a few birds heard occasionally overhead still, but most movement stopped. moon: 2/3 full. Aside from roost. Chauna flying in just before 2000 I began to try and spotlight roosting birds, using the car head- lamp and a butterfly-type net. The birds were very easy to find - quite visible as they crouched or sat against the ground. The roost has several different micro-habitat types: Fence Cattle trod Area w/o water Polyborus nest Tule Open water Fence Cattle trod Area w/o water 3" spurge with thick underlying short grass Ant-hills Rised hill w/ Solanum 25 m ->