Plots of temperature-mass relationships for 80 of the 952 species. Grey points are individuals and black lines show ordinary least squares linear regression of relationships. Ranges of both mass and temperature axes vary depending on species. Species names with corresponding plot numbers: (1) Abrothrix olivaceus, (2) Acanthis flammea, (3) Accipiter cooperii, (4) Accipiter gentilis, (5) Accipiter striatus, (6) Acridotheres tristis, (7) Actitis macularia, (8) Aechmophorus clarkii, (9) Aechmophorus occidentalis, (10) Aegithalos caudatus, (11) Aegolius acadicus, (12) Aegolius funereus, (13) Aeronautes saxatalis, (14) Agelaius phoeniceus, (15) Agelaius tricolor, (16) Aimophila carpalis, (17) Aimophila cassinii, (18) Aimophila rufescens, (19) Aimophila ruficeps, (20) Aix sponsa, (21) Alauda arvensis, (22) Alcedo quadribrachys, (23) Alethe diademata, (24) Alethe poliocephala, (25) Alle alle, (26) Amazilia beryllina, (27) Amazilia cyanocephala, (28) Amazilia rutila, (29) Ammodramus caudacutus, (30) Ammodramus henslowii, (31) Ammodramus humeralis, (32) Ammodramus sandwichensis, (33) Ammodramus savannarum, (34) Ammospermophilus leucurus, (35) Amphispiza belli, (36) Amphispiza bilineata, (37) Anas acuta, (38) Anas americana, (39) Anas clypeata, (40) Anas crecca, (41) Anas cyanoptera, (42) Anas discors, (43) Anas platyrhynchos, (44) Anas rubripes, (45) Anas strepera, (46) Anoura geoffroyi, (47) Anser albifrons, (48) Anser caerulescens, (49) Anthreptes collaris, (50) Anthreptes rectirostris, (51) Anthus hodgsoni, (52) Anthus rubescens, (53) Anthus spinoletta, (54) Anthus trivialis, (55) Antrozous pallidus, (56) Apalis flavida, (57) Apalis thoracica, (58) Aphelocoma californica, (59) Aphelocoma coerulescens, (60) Aphelocoma ultramarina, (61) Aplodontia rufa, (62) Apodemus agrarius, (63) Apodemus peninsulae, (64) Apodemus uralensis, (65) Aquila chrysaetos, (66) Archilochus alexandri, (67) Archilochus colubris, (68) Ardea alba, (69) Ardea herodias, (70) Arenaria interpres, (71) Artibeus jamaicensis, (72) Artibeus lituratus, (73) Artibeus toltecus, (74) Asio flammeus, (75) Asio otus, (76) Athene cunicularia, (77) Attila spadiceus, (78) Aulacorhynchus prasinus, (79) Auriparus flaviceps, (80) Automolus ochrolaemus.