Francisco Piedrahita:
Gaviotín Real, Royal Tern (Sterna maxima) (Thalasseus maximus)
Francisco Piedrahita:
Gaviotín Real, Royal Tern, (Sterna maxima) (Thalasseus maximus)
Francisco Piedrahita:
Gaviotín Real, Royal Tern (Thalasseus maximus) (Sterna maxima)
Francisco Piedrahita:
Gaviotín Picudo, Large-billed Tern (Phaetusa simplex)
Francisco Piedrahita:
Gaviotín Negro, Black Tern (Chlidonias niger)
Francisco Piedrahita:
Gaviotín Negro, Black Tern (Chlidonias niger)
Francisco Piedrahita:
Gaviotín Inca, Inca Tern (Larosterna inca)
Francisco Piedrahita:
Gaviotín Inca, Inca Tern (Larosterna inca)
Francisco Piedrahita:
Gaviotín Inca, Inca Tern (Larosterna inca)
Francisco Piedrahita:
Gaviotín Picudo, Large-billed Tern (Phaetusa simplex)
Francisco Piedrahita:
Gaviotín Picudo, Large-billed Tern (Phaetusa simplex)
Francisco Piedrahita:
Gaviotín Picudo, Large-billed Tern (Phaetusa simplex)
Francisco Piedrahita:
Gaviotín Piquirrojo, Caspian Tern (Hydroprogne caspia) (Sterna caspia)
Francisco Piedrahita:
Gaviotín Piquirrojo, Caspian Tern (Sterna (Hydroprogne) caspia)
Francisco Piedrahita:
Gaviotín Piquirrojo, Caspian Tern (Hydroprogne caspia) (Sterna caspia)
Francisco Piedrahita:
Gaviotín Enano (Sterna albifrons)
Francisco Piedrahita:
Picotijera, Black Skimmer (Rynchops nigra) (Rynchops niger)
Francisco Piedrahita:
Picotijera, Black Skimmer (Rynchops nigra) (Rynchops niger)
Francisco Piedrahita:
Picotijera, Black Skimmer (Rynchops nigra) (Rynchops niger)
Francisco Piedrahita:
Gaviota Argéntea, Herring Gull (Larus argentatus)
Francisco Piedrahita:
Gaviota Argéntea, Herring Gull (Larus argentatus)
Francisco Piedrahita:
Gaviota Argéntea, Herring Gull (Larus argentatus)
Francisco Piedrahita:
Gaviota Argéntea, Herring Gull (Larus argentatus)
Francisco Piedrahita:
Gaviota Argéntea, Herring Gull (Larus argentatus)
Francisco Piedrahita:
Gaviota Argéntea, Herring Gull (Larus argentatus)
Francisco Piedrahita:
Gaviota de Delaware, Ring-billed Gull (Larus delawarensis)
Francisco Piedrahita:
Gaviota de Delaware, Ring-billed Gull (Larus delawarensis)
Francisco Piedrahita:
Gaviota de Delaware, Ring-billed Gull (Larus delawarensis)
Francisco Piedrahita:
Gaviota de Belcher, Belcher's Gull (Larus belcheri)
Francisco Piedrahita:
Gaviota de Belcher, Belcher's Gull (Larus belcheri)
