. Bollettino della British ornitologi Club. Volker Salewski et al. 49 Bull B.O.C. 2003, 123(1) Elencate tutte le specie incontrate. Da questi elenchi si sono calcolati i tassi di degenza per Gambaga Flycatchers esprimendo il numero di giorni con osservazioni come una percentuale del numero totale di giorni del mese quando le osservazioni sono state fatte. A causa del basso numero di osservazioni in alcuni mesi abbiamo calcolato la media di ogni mese in tre stagioni. Alcune osservazioni aggiuntive sono state effettuate nella stessa area in Febbraio-aprile 1998, in settembre-ottobre 2000, e nel nord del parco (9° 16') in ear

• Collaboratore: Book Worm / Alamy Foto Stock
• ID dell’immagine: RGHMXM
• Dimensioni dei file: 7,2 MB (119,2 KB Download compresso)
• Liberatorie: Modello - no | Proprietà - no
• Dimensioni: 2003 x 1248 px | 33,9 x 21,1 cm | 13,4 x 8,3 inches | 150dpi

Altre informazioni

Questa foto è un'immagine di pubblico dominio, il che significa che il copyright è scaduto o che il titolare del copyright ha rinunciato a tale diritto. Alamy addebita un costo per l'accesso alla copia ad alta risoluzione dell'immagine.

Questa immagine potrebbe avere delle imperfezioni perché è storica o di reportage.

. Bulletin of the British Ornithologists Club. Volker Salewski et al. 49 Bull B.O.C. 2003 123(1) listed all species encountered. From these lists we calculated encounter rates for Gambaga Flycatchers by expressing the number of days with observations as a percentage of the total number of days in the month when observations were made. Due to the low number of observations in some months we calculated the mean of each month in the three seasons. Some additional observations were made in the same area in February-April 1998, in September-October 2000, and in the north of the park (9° 16') in early 1999. The occurrence of Gambaga Flycatchers in the area was distinctly seasonal (Fig 1), rising from a low observation rate in October, peaking in February and falling again to April. The only September record was in 2000 when one bird was mist- netted late in the month. From October to November we encountered mostly single birds in an isolated forest, whereas after the savanna fires in late December we regularly saw many birds in the savanna, often in pairs. Of 20 birds mist-netted between September and April in bush/tree savanna and an isolated forest, only one had a few body feathers (<20) in moult, in November. Primaries of two birds netted in September and December were new, those of twelve birds netted in November-March were old and much abraded by February and March. For four birds (in December, February, March and April respectively) we were unable 2 O 0) O 25 20 15 10 --. Sep Oct Nov Dec Jan Month Feb Mar Apr Fig. 1: Phenology of Gambaga Flycatcher in northern Ivory Coast. The observation rate is the percentage of days with observations of the species out of the total number of days when observations were made, in several habitats in all three years.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original

Parole chiave associate all'immagine

• bookauthorbritishornithologi