Comparative day and night feeding strategies of shorebird species in a tropical environment
作者:
MICHEL ROBERT,
RAYMOND McNEIL,
期刊:
Ibis
(WILEY Available online 1989)
卷期:
Volume 131,
issue 1
页码: 69-79
ISSN:0019-1019
年代: 1989
DOI:10.1111/j.1474-919X.1989.tb02745.x
出版商: Blackwell Publishing Ltd
数据来源: WILEY
摘要:
A study was carried out in northeastern Venezuela to determine whether or not shorebirds feed at night in tropical environments. Results show that some Neotropical residents and Nearctic winter migrants feed during darkness. During daylight, Black‐winged StiltsHimantopus himantopus, mexicanusgroup, were predominantly visual foragers (75% attempts were pecking), performing a tactile type of feeding technique (immersion of the whole head and portion of the neck while searching for food through soft mud) on other occasions. During night‐time, they were almost equally visual (pecking) and tactile (multiple scythelike sweeps) foragers. Greater and Lesser YellowlegsTringa melanoleucaandT. flavipesforaged visually during daylight and tactilely (sidesweeping) at night. Short‐billed DowitchersLimnodromus griseuswere tactile feeders (probers) both by day and by night while Semipalmated PloversCharadrius semipalmatusduring daylight and at night and Wilson's PloversC. tvilsoniaby night were sight feeders (peckers). Prey abundance was higher at night than during daylight. Black‐winged Stilts and yellowlegs seemed to feed at night on food items at least partly different from those they fed upon during d
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