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Report on the First Saturday Birdwatch at the Long Island Park in 2018

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Report on the First Saturday Birdwatch at the Long Island Park in 2018 Report on the First Saturday Birdwatch at the Long Island Park in 2018 Daisuke Horii † and Milang Eberdong ‡ Prepared in December 2018 Citrine White-eye (Zosterops semperi) 1. Introduction Since 2013, Belau National Museum (BNM) has held educational birdwatching events at Ngermalk Island (Long Island Park and Conservation Area) in the Republic of Palau on the first Saturday of every month in the morning (6:00 AM–8:00 AM) to broaden awareness of resident bird species, especially endemic forest birds. The events are open to everyone, including students, visiting birders and local birders. This report explains the summary of the events in 2018. We hope more potential birdwatchers will join the events. 2. Participants A total of 94 birders joined the first Saturday events at the Long Island Park in 2018. The number of participants ranged from 3 to 17 per month. They were students, divers, bird enthusiasts, NGO staff, researchers, etc. This event is getting popular with residents and tourists. There were few participants when this event began in 2013. _____________ †Koror State Government, P.O. Box 116, Koror, Palau 96940 ‡Belau National Museum, P.O. Box 666, Koror, Palau 96940 Table 1. Participants of the first Saturday birdwatch event in 2018 Date in 2018 # of Participants Residents 14 6 January 14 Visitors 0 Residents 7 3 February 7 Visitors 0 Residents 6 3 March 6 Visitors 0 Residents 4 7 April 4 Visitors 0 Residents 6 5 May 6 Visitors 0 Residents 6 2 June 6 Visitors 0 Residents 14 7 July 17 Visitors 3 Residents 3 4 August 11 Visitors 8 Residents 3 1 September 3 Visitors 0 Residents 3 6 October 3 Visitors 0 Residents 6 3 November 7 Visitors 1 Residents 10 1 December 10 Visitors 0 Residents 82 Total 94 Visitors 12 Figure 1. Participants of the first Saturday birdwatch 3. Results The participants’ observation data was derived from eBird websites (http://ebird.org/home) and the authors’ field notes. A cumulative total of 31 bird species—21 resident species, five introduced species, and five migratory species—were recorded during the events at the Long Island Park from January to December in 2018. The number of species ranged from 10 to 25 species in each of the months, averaging 16.75 species per visit. Rare migratory birds such as Black-crowned Night-Heron (Nycticorax nycticorax) (Figure 2) and Gray-faced Buzzard (Butastur indicus) (Figure 3) were also observed. The sight of Gray-faced Buzzard was the third record for Palau after at Ngerekebesang Island in 2001 (Wiles et al. 2004) and at Kayangel Atoll in 2004 (Pratt et al. 2010). Figure 2. Black-crowned Night-Heron (Nycticorax nycticorax) at the Long Island Park Figure 3. Gray-faced Buzzard (Butastur indicus) at the Long Island Park Table 2. Observations of Birds at the Long Island Park during the first Saturday Birdwatch in 2018 (*ct. means counts) No. Species Category Frequency 6-Jan 3-Feb 3-Mar 7-Apr 5-May 2-Jun 7-Jul 4-Aug 1-Sep 6-Oct 3-Nov 1-Dec 1 Black Noddy (Anous minutus) Resident 12 times 5 ct. 3 ct. 1 ct. 5 ct. 4 ct. 4 ct. 3 ct. 9 ct. 2 ct. 2 ct. 7 ct. 2 ct. 2 Micronesian Myzomela (Myzomela rubratra) Resident 12 times 4 ct. 4 ct. 5 ct. 9 ct. 4 ct. 6 ct. 1 ct. 2 ct. 2 ct. 3 ct. 2 ct. 5 ct. 3 Micronesian Starling (Aplonis opaca) Resident 12 times 10 ct. 10 ct. 9 ct. 14 ct. 16 ct. 13 ct. 6 ct. 22 ct. 2 ct. 7 ct. 10 ct. 11 ct. 4 Palau Flycatcher (Myiagra erythrops) Resident 12 times 6 ct. 5 ct. 9 ct. 3 ct. 4 ct. 5 ct. 2 ct. 2 ct. 4 ct. 6 ct. 2 ct. 3 ct. 5 Palau Swiftlet (Aerodramus pelewensis) Resident 12 times 6 ct. 2 ct. 7 ct. 2 ct. 7 ct. 5 ct. 5 ct. 5 ct. 8 ct. 1 ct. 3 ct. 8 ct. 6 Collared Kingfisher (Todiramphus chloris) Resident 11 times 2 ct. 2 ct. 3 ct. 2 ct. 4 ct. 1 ct. 2 ct. 2 ct. 2 ct. 2 ct. 3 ct. 7 Dusky White-eye (Zosterops finschii) Resident 11 times 9 ct. 7 ct. 5 ct. 9 ct. 11 ct. 8 ct. 3 ct. 1 ct. 5 ct. 4 ct. 2 ct. 8 Palau Fantail (Rhipidura lepida) Resident 11 times 2 ct. 3 ct. 4 ct. 2 ct. 2 ct. 2 ct. 2 ct. 2 ct. 1 ct. 2 ct. 3 ct. 9 Palau Fruit-Dove (Ptilinopus pelewensis) Resident 11 times 3 ct. 12 ct. 12 ct. 14 ct. 11 ct. 15 ct. 5 ct. 7 ct. 8 ct. 4 ct. 3 ct. 10 Palau Bush Warbler (Horornis annae) Resident 10 times 4 ct. 4 ct. 7 ct. 3 ct. 7 ct. 2 ct. 1 ct. 31 ct. 3 ct. 1 ct. 11 Red Junglefowl (Gallus gallus) Introduced 10 times 4 ct. 2 ct. 4 ct. 4 ct. 6 ct. 9 ct. 9 ct. 5 ct. 3 ct. 8 ct. 12 Morningbird (Pachycephala tenebrosa) Resident 9 times 3 ct. 4 ct. 2 ct. 3 ct. 2 ct. 1 ct. 1 ct. 1 ct. 4 ct. 13 Palau Cicadabird (Coracina monacha) Resident 9 times 1 ct. 1 ct. 2 ct. 3 ct. 1 ct. 1 ct. 1 ct. 4 ct. 1 cd. 14 White Tern (Gygis alba) Resident 8 times 5 ct. 2 ct. 7 ct. 6 ct. 1 ct. 5 ct. 3 ct. 3 ct. 15 Eurasian Tree Sparrow (Passer montanus) Introduced 7 times 3 ct. 6 ct. 5 ct. 8 ct. 2 ct. 1 ct. 1 ct. 16 Citrine White-eye (Zosterops semperi) Resident 6 times 2 ct. 7 ct. 4 ct. 6 ct. 8 ct. 1 ct. 17 White-tailed Tropicbird (Phaethon lepturus) Resident 6 times 1 ct. 1 ct. 1 ct. 2 ct. 1 ct. 1 ct. 18 Blue-faced Parrotfinch (Erythrura trichroa) Resident 5 times 1 ct. 2 ct. 3 ct. 1 ct. 2 ct. 19 Pacific Golden-Plover (Pluvialis fulva) Migratory 4 times 1 ct. 1 ct. 1 ct. 1 ct. 20 Sulphur-crested Cockatoo (Cacatua galerita) Introduced 4 times 1 ct. 2 ct. 2 ct. 8 ct. 21 Common Sandpiper (Actitis hypoleucos) Migratory 3 times 1 ct. 1 ct. 1 ct. 22 Chestnut Munia (Lonchura atricapilla) Introduced 3 times 4 ct. 3 ct. 15 ct. 23 Black-naped Tern (Sterna sumatrana) Resident 2 times 2 ct. 2 ct. 24 Brown Noddy (Anous stolidus) Resident 2 times 2 ct. 2 ct. 25 Rufous Night-Heron (Nycticorax caledonicus) Resident 2 times 2 ct. 2 ct. 26 Nicobar Pigeon (Caloenas nicobarica) Resident 2 time 1 ct. 1 ct. Micronesian Imperial-Pigeon (Ducula 27 oceanica) Resident 1 time 1 ct. 28 Barn Swallow (Hirundo rustica) Migratory 1 time 2 ct. Black-crowned Night-Heron 29 (Nycticorax nycticorax) Migratory 1 time 1 ct. 30 Gray-faced Buzzard (Butastur indicus) Migratory 1 time 1 ct. 31 Eclectus Parrot (Eclectus roratus) Introduced 1 time 1 ct. 18 15 16 17 25 14 10 17 15 20 14 20 Species Richness of the month species species species species species species species species species species species species 4. Discussion During the survey conducted by BNM in 2007-2008, 24 resident species, 3 introduced species, and 18 migratory birds were reported as baseline data for the Long Island Park (Olsen and Eberdong, 2008). To compare with the baseline data, two resident species (Greater Crested Tern and Pacific Reef-Heron) were not observed; two introduced species (Sulphur-crested Cockatoo and Eclectus Parrot) were newly observed; 14 migratory birds (e.g., Ruddy Turnstone and Bar-Tailed Godwit) were not observed while one migratory bird (Gray-faced Buzzard) was newly observed in 2018. Most of the recorded migratory birds in 2007-2008 were shorebirds which are often found when it is low tide, and the first Saturday birdwatch was conducted in the morning no matter it was low tide or high tide. It might be noteworthy that the two introduced parrots (Sulphur-crested Cockatoo and Eclectus Parrot) were not found in 2007-2008 but found in 2018. 5. To Be Continued Dr. Alan R. Olsen, who was the co-organizer of the first Saturday birdwatch event, has passed away unexpectedly on 24 June 2018. The event has become popular among residents and tourists in Palau because of his dedication to bringing awareness about birds to the citizens. The first Saturday birdwatch event will be continued with an appreciation for his passion. 6. References Olsen, R. A and Eberdong, M. 2008. Report on the Birds of Long Island Park (Ngermalk Island). Belau National Museum Pratt, H. D., Falanruw, M., Olsen, A., Buden D. W., Clement, P., Gupta, A., Ketebengang, H., Yalap, Y. P., Herter. D. R., Klauber D., Pisano, P., Vice, D. S., Wiles, G. J. 2010. Noteworthy bird observations from the Caroline and Marshall Islands 1988–2009, including five new records for Micronesia. Western Birds 41:70–101 Wiles, G. J., Johnson, N. C., de Cruz, J. B., Dutson, G., Camacho, V. A., Kepler, A. K., Vice, D. S., Garrett, K. L., Kessler, C. C., and Pratt, H. D. 2004. New and noteworthy bird records from Micronesia, 1986–2003. Micronesica 37:69–96. .
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