National Park. Based on the high estimated weight when taken of Egyptian goose of , male geese may be targeted over females. Larger wading birds are also fairly frequently attacked including herons and egrets, flamingoes storks, ibises, spoonbills and cranes. The diversity and number of storks taken is particularly impressive. They are known to take 8 species of stork, ranging from the smallest known species, the African openbill (Anastomus lamelligerus), to the tallest species in the world, the , -tall saddle-billed stork (Ephippiorhynchus senegalensis). One naturalists observed up to a half dozen attacks in different parts of Africa on white storks (Ciconia ciconia). Short of three attacks on spotted thick-knees (Burhinus capensis), which weigh about , and smaller still crowned lapwings (Vanellus coronatus) so far as is known small waders or shorebirds are ignored as prey. Other assorted avian prey may consists of ostrich (Struthio camelus) chicks weighing an estimated mean of , frequently resulting in the immediate ire of protective ostrich parents. Further avian prey may extent to sandgrouse, pigeons and doves, hornbills and crows. Beyond occasional captures of other birds of prey (covered later), one other impressive avian prey species is the southern ground hornbill (Bucorvus leadbeateri), which at is probably the world's largest hornbill. At the other end of the scale, some martial eagles may capture a few small social species of passerine, which are exceptionally small prey (the smallest recorded prey species for the eagle overall), potentially consisting of the red-billed queleas (Quelea quelea) and the sociable weavers (Philetairus socius), as practically every meat-eating bird in Africa may be attracted to these species’ colonial abundance. Reptiles Reptiles can be locally important in the diet, and they are known to take larger numbers of reptiles than other large African booted eagles. Only relatively large reptiles, it seems, are attacked and many of this prey is also potentially dangerous, so martial eagles have unusually long, gracile tarsi, perhaps an adaptation to dangerous large reptilian prey. Based on the photographic analysis, reptilian prey, predominately adult monitors comprise 21% of the total 239 prey items. In particular, in the former Transvaal province of northeastern South Africa, reptiles were the main prey, with monitor lizards alone comprising just under half of the prey remains. A small food study in Zimbabwe found that 69% of 39 prey items were made up of monitor lizards. Large monitors such as rock monitors (Varanus albigularis),