Tagus Estuary Natural Reserve breed on adjacent farmland. Little bustard ("Tetrax tetrax") occurs all year but is more numerous in winter. Raptors which may be seen over the fields include black-winged kite ("Elanus caeruleus"), short-toed eagle ("Circaetus gallicus") and booted eagle ("Aquila pennatus") Nearby patches of woodland hold short-toed treecreeper ("Certhia brachydactyla"), European nightjar ("Caprimulgus europaeus"), red-necked nightjar ("Caprimulgus ruficollis"), Iberian magpie ("Cyanopica cooki") and many passerines. During the Spring and Autumn many species stopover on the Tagus during their migration these include curlew sandpiper ("Calidris ferruginea") in large numbers with many other shorebirds in smaller numbers, Common redshank and Balck-tailed Godwits reach their
Tulipa tarda Tulipa tarda Tulipa tarda (late tulip, tarda tulip) is a perennial growing from a bulb. It belongs to the section biflores. By some sources the accepted name is Tulipa urumiensis. It has a leathery tunic that is glabrous on the inside. It has up to seven linear green leaves that can be up to 20 cm long. The stem is between 4 and 20 cm long. The yellow flowers have white tips, anthers and stamen are yellow. "Tulipa tarda" is native to central Asia, growing in rocky subalpine meadows in the Tian Shan. It was confused with "Tulipa dasystemon" for