Grp
Foraging Niches
Stiffness parameter range l/r Deflection Parameter range (l/r)³ (r+d)/r (\(\mathbf{10}^{\mathbf{6}}\)) Median DP (106)
1
Aquatic Dive Penguins, Divers, Grebes, Diving Petrels, Cormorants and Murres
59 - 301
0.5 – 126.5
37
2
Aquatic Plunge Gannets and Terns
311 - 449
99 – 541
202
3
Aquatic Surface Albatrosses, Blue Petrel, Grey Petrel, Pelicans, Geese, Coots, Finfoot, Gulls
241 - 733
46 - 1751
276
4
Aquatic Aerial Great-winged Petrel, Storm Petrels, Frigate Birds, Skuas and Skimmers
241 - 549
93 - 968
328
5
Aquatic Ground Herons, Egrets, Hamerkop, Storks, Saddlebill, Ibises, Flamingos, Limpkin, Jacanas, Greater Painted-snipe, Crab Plover, Oystercatchers, Avocets, Plovers, Curlews and Phalaropes
233 - 710
64 - 2036
935
6
Aquatic Perch Kingfishers
383
301
301
7
Herbivore Aquatic Surface Ducks
328
145
145
8
Herbivore Aquatic Ground Horned Screamer
306
127
127
9
Invertivore Ground Dikkops
320
261
261
10
Land birds Ground Feeding Wild Turkey, Francolins, Blue Crane, Sheathbill, Namaqua Sandgrouse, Turtle-dove, Parrots, Cougals and Starlings
353 – 1333
312 – 13107
1228
11
Aerial/Sally Nightjars, Swifts and Narina Trogon
451 - 743
709 - 3929
2605