Birds (3) Colombie (2) Passeriformes (2) Life (2) Aves (2) oiseau (1) vallée (1) espèce (1) méthode (1) Costa Rica (1) The Valley (1) Dynamics (1) Methods (1) Description and travel (1) Rates (1) Variations (1) Vacuum (1) Ci (Chinese poetry) (1) Toleration (1) Tarsus (1) Survival (1) Success (1) Storms (1) Species (1) Sampling (1) Nutrition--Evaluation (1) Mechanics (1) Mass (1) Landscapes (1) Hypothesis (1)