フィリッピンと日本はともに豊富な鳥類相を持っていて，それぞれ556種および524種が記録されている。また両国の共通種は215種あり，そのうちの138種が渡り鳥である。現在，19種が日本からフィリッピンに渡るといわれていて，そのうちの12種はMAPS（Migratory Animal Pathological Survay移動動物の病理学研究調査）によって記録されており，残りの7種は山階鳥類研究所による標識回収によって渡りが判明している。今後，フィリッピンにおける標識放鳥数が増加することによって，両国を渡る種数が増えていくものと考えられる。
　鳥類保護についてみると，フィリッピンは約87種で絶滅の恐れがあり，その大多数は固有の森林性の鳥類で，森林棲息地消失の増大によって棲息が脅かされている。日本における絶滅の恐れのある種は26種に過ぎず，その中で6種のみが固有種である。しかしながら，日本のフィリッピンの両国で記録された鳥類のなかには，11種の渡り鳥を含む14種の絶滅の恐れのある種がある。したがって，フィリッピン固有の鳥類および両国共通種である渡り鳥に対して，共同保護活動を促進していく必要がある。

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Red-necked Phalarope Phalaropus lobatus is a common spring and autumn migrant along the Japanese coast, and is also occasionally seen in small flocks inland. At about 9:00 PM on the night of September 13th, 1993, a flock of 100 Red-necked Phalarope strayed into Okoppe-cho Baseball Stadium (Monbetsu County, Eastern Hokkaido -44°28′N, 143°08′E). Presumably these birds had been attracted by the bright stadium lights (similar incidents have been recorded in the past for this species, but not during the last 20 years). The birds flew around the stadium, sometimes landing for brief intervals, for about 30 minutes before departing. Some of the birds crashed into the standium fence and were killed or injured. 6 of these were recovered as specimens to be measured and analyzed at the Natural History Museum and Institute. Chiba (specimen No. CBMZB1775-CBMZB1780). All of the recovered specimens were juveniles which had not yet molted into the 1st winter plumage. All specimens showed pale cream coloration from throat to breast, and diagnostic dark brown markings on the tertials. Juvenile feathers also remained on the mantle and wing-coverts. Observations at the stadium confirmed that no adults were present in the flock. Large flocks of Red-necked Phalarope, numbering from 1000-3600 individuals, are frequently observed during the spring migration period. These large flocks, however, are composed of adults, and flocks, however, are composed of adults, and flocks of juveniles number only in the low one-hundreds. This indicates that adults and juveniles migrate separately in spring. The data discussed here supports the contention that juveniles and adults also migrate separately in autumn, with juveniles leaving the breeding grounds later than adults. Unfortunately, age-composition data is not available for earlier incidents.

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