Supplementary Figures S1 - S11 PC1 (−) PC1 mean PC1 (+) 30 Figure S1. Shape of eggs associated with 10 20 50 O1 different regions of specific principal components: 5 10 O1 minimal, mean, and maximum. O1 0 0 0 O2 O O2 O O2 O O3 O3 O3 −5 −50 −20 −10 −15 −100 −40 −100 −50 0 50 100 −30 −10 0 10 20 30 −15 −10 −5 0 5 10 15 PC2 (−) PC2 mean PC2 (+) 40 20 20 20 O1 O1 10 O1 0 0 O2 O3O O2 O 0 O2 O O3 −20 O3 −10 −20 −40 −20 −40 −60 −30 −40 −20 0 20 40 −40 −20 0 20 40 −20 −10 0 10 20 PC3 (−) PC3 mean PC3 (+) 30 20 20 O1 20 O1 10 10 O1 0 0 0 O2 O O2 O O2 O O3 O3 O3 −10 −20 −20 −20 −40 −30 −40 −40 −20 0 20 40 −20 0 20 −30 −20 −10 0 10 20 30 15 Figure S2. Position of orders in the space of PC1 and PC2. Shape of eggs correspond to specific parts of PCs. 10 Loadings are shown at the lower left corner of figure. All orders 5 ACCIPITRIFORMES ANSERIFORMES APODIFORMES BUCEROTIFORMES CAPRIMULGIFORMES 0 CARIAMIFORMES CHARADRIIFORMES CICONIIFORMES COLUMBIFORMES PC2 CORACIIFORMES −5 CUCULIFORMES EURYPYGIFORMES FALCONIFORMES GALLIFORMES GAVIIFORMES GRUIFORMES −10 OTIDIFORMES PASSERIFORMES PELECANIFORMES PHOENICOPTERIFORMES PICIFORMES −15 PODICIPEDIFORMES PROCELLARIIFORMES PSITTACIFORMES PTEROCLIDIFORMES SPHENISCIFORMES −20 STRIGIFORMES SULIFORMES −40 −30 −20 −10 0 10 20 PC1 Icz LD PC2 Ilz Iiz PC1 15 30 Figure S3. Position of orders with altricial developmental mode in the space −30 of PC1 and PC2. Outlines of eggs for each order is given around 10 APODIFORMES the perimeter of main plot. 30 5 −30 BUCEROTIFORMES 0 30 PC2 −5 −30 COLUMBIFORMES −10 30 altricial APODIFORMES −30 BUCEROTIFORMES COLUMBIFORMES −15 CORACIIFORMES CORACIIFORMES CUCULIFORMES PASSERIFORMES PELECANIFORMES 30 PHOENICOPTERIFORMES −20 PICIFORMES PSITTACIFORMES SULIFORMES −30 −40 −30 −20 −10 0 10 20 CUCULIFORMES PC1 30 30 30 30 30 30 −30 −30 −30 −30 −30 −30 PASSERIFORMES PELECANIFORMES PHOENICOPTERIFORMES PICIFORMES PSITTACIFORMES SULIFORMES 15 30 Figure S4. Position of orders with precocial developmental mode in the space −30 of PC1 and PC2. Outlines of eggs for each order is given around 10 ANSERIFORMES the perimeter of main plot. 30 5 −30 CARIAMIFORMES 0 30 PC2 −5 −30 CHARADRIIFORMES −10 30 precocial −30 ANSERIFORMES CARIAMIFORMES −15 CHARADRIIFORMES EURYPYGIFORMES EURYPYGIFORMES GALLIFORMES GAVIIFORMES GRUIFORMES 30 −20 OTIDIFORMES PODICIPEDIFORMES PTEROCLIDIFORMES −30 −40 −30 −20 −10 0 10 20 GALLIFORMES PC1 30 30 30 30 30 −30 −30 −30 −30 −30 GAVIIFORMES GRUIFORMES OTIDIFORMES PODICIPEDIFORMES PTEROCLIDIFORMES 15 30 Figure S5. Position of orders with semialtricial developmental mode −30 in the space of PC1 and PC2. Outlines of eggs for each order is 10 ACCIPITRIFORMES given around the perimeter of main plot. 30 5 −30 CICONIIFORMES 0 30 PC2 −5 −30 FALCONIFORMES −10 30 −30 −15 PELECANIFORMES semialtricial ACCIPITRIFORMES 30 CICONIIFORMES −20 FALCONIFORMES PELECANIFORMES STRIGIFORMES −30 −40 −30 −20 −10 0 10 20 STRIGIFORMES PC1 15 30 Figure S6. Position of orders with semiprecocial developmental mode −30 in the space of PC1 and PC2. Outlines of eggs for each order is 10 CAPRIMULGIFORMES given around the perimeter of main plot. 30 5 −30 CHARADRIIFORMES 0 30 PC2 −5 −30 PROCELLARIIFORMES −10 30 −30 −15 SPHENISCIFORMES semiprecocial CAPRIMULGIFORMES −20 CHARADRIIFORMES PROCELLARIIFORMES SPHENISCIFORMES −40 −30 −20 −10 0 10 20 PC1 Figure S7. Position of orders in the space of PC2 and PC3. Shape of eggs 15 correspond to specific parts of PCs. Loadings are shown at the lower left corner of figure. 10 All orders ACCIPITRIFORMES ANSERIFORMES APODIFORMES BUCEROTIFORMES 5 CAPRIMULGIFORMES CARIAMIFORMES CHARADRIIFORMES CICONIIFORMES COLUMBIFORMES PC3 CORACIIFORMES CUCULIFORMES 0 EURYPYGIFORMES FALCONIFORMES GALLIFORMES GAVIIFORMES GRUIFORMES OTIDIFORMES −5 PASSERIFORMES PELECANIFORMES PHOENICOPTERIFORMES PICIFORMES PODICIPEDIFORMES PROCELLARIIFORMES −10 PSITTACIFORMES PTEROCLIDIFORMES SPHENISCIFORMES STRIGIFORMES SULIFORMES −20 −15 −10 −5 0 5 10 15 PC2 Iiz Ilz LD PC3 Icz PC2 30 Figure S8. Position of orders with altricial developmental mode 15 in the space of PC2 and PC3. −30 Outlines of eggs for each order is given around the perimeter of main plot. APODIFORMES 10 30 −30 BUCEROTIFORMES 5 30 PC3 −30 0 COLUMBIFORMES 30 −5 altricial APODIFORMES −30 BUCEROTIFORMES COLUMBIFORMES CORACIIFORMES CORACIIFORMES CUCULIFORMES PASSERIFORMES −10 PELECANIFORMES 30 PHOENICOPTERIFORMES PICIFORMES PSITTACIFORMES SULIFORMES −30 −20 −15 −10 −5 0 5 10 15 CUCULIFORMES PC2 30 30 30 30 30 30 −30 −30 −30 −30 −30 −30 PASSERIFORMES PELECANIFORMES PHOENICOPTERIFORMES PICIFORMES PSITTACIFORMES SULIFORMES 30 Figure S9. Position of orders with precocial developmental mode 15 −30 in the space of PC2 and PC3. Outlines of eggs for each order is ANSERIFORMES given around the perimeter of main plot. 10 30 −30 CARIAMIFORMES 5 30 PC3 −30 0 CHARADRIIFORMES 30 −5 precocial −30 ANSERIFORMES CARIAMIFORMES CHARADRIIFORMES EURYPYGIFORMES EURYPYGIFORMES GALLIFORMES −10 GAVIIFORMES GRUIFORMES 30 OTIDIFORMES PODICIPEDIFORMES PTEROCLIDIFORMES −30 −20 −15 −10 −5 0 5 10 15 GALLIFORMES PC2 30 30 30 30 30 −30 −30 −30 −30 −30 GAVIIFORMES GRUIFORMES OTIDIFORMES PODICIPEDIFORMES PTEROCLIDIFORMES Figure S10. Position of orders with 30 semialtricial developmental mode in the space of PC2 and PC3. 15 −30 Outlines of eggs for each order is given around the perimeter of main plot. ACCIPITRIFORMES 10 30 −30 CICONIIFORMES 5 30 PC3 −30 0 FALCONIFORMES 30 −5 −30 PELECANIFORMES semialtricial −10 ACCIPITRIFORMES 30 CICONIIFORMES FALCONIFORMES PELECANIFORMES STRIGIFORMES −30 −20 −15 −10 −5 0 5 10 15 STRIGIFORMES PC2 Figure S11. Position of orders with 30 semiprecocial developmental mode 15 in the space of PC2 and PC3. −30 Outlines of eggs for each order is given around the perimeter of main plot. CAPRIMULGIFORMES 10 30 −30 CHARADRIIFORMES 5 30 PC3 −30 0 PROCELLARIIFORMES 30 −5 −30 SPHENISCIFORMES −10 semiprecocial CAPRIMULGIFORMES CHARADRIIFORMES PROCELLARIIFORMES SPHENISCIFORMES −20 −15 −10 −5 0 5 10 15 PC2.