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Adult Black Skimmer

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Shorebirds are some of the most migratory animals known to science today, and the habitats they utilize for nesting and feeding are critical to maintaining a healthy weight while migrating and for successfully raising chicks. Many of these vulnerable shorebirds have seen declines since the 1970s. Factors affecting these birds include degradation of their wintering or staging grounds through development, human disturbance, pesticide use, pollution, and oil spills (Pfister et al. 1991). Pressures affecting nesting birds often lead to lower nest success and may include predators, flooding, human disturbance, and urban development (Maslo et al. 2016).

Humans impact nesting birds in many ways. Human influences include, predation by introduced predators, habitat quantity and quality being diminished, and direct disturbance or destruction of nests accidentally or intentionally (Maslo, et al. 2018). Specifically, many common beach activities can have a strong impact on nest success. Many eggs are very small and are camouflaged to match the surrounding sand. This can make them difficult to see and vulnerable to being stepped on by beach goers, or destroyed by vehicles. Unleashed dogs can also scare adult birds, destroy nests, or harm young chicks. Human presence can also cause birds to flee making nests vulnerable to predation, or enough disturbance can cause adults to abandon their nests altogether (Spratt 2015).

Adult American Oystercatcher with chicks

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Creator: Greg Gard Credit:
Copyright: ©Greg Gard 2018

 In Cape May and the rest of New Jersey, the beach-nesting birds of highest concern are the American Oystercatcher (emotopus palliates)Black Skimmer (Rynchops niger), Least Tern (Sterna antillarum), and Piping Plover (Charadrius melodus). Terns and skimmers are colony nesters meaning that they will nest in large groups. These species will also feed their young, and chicks will rarely venture beyond the colony.  Piping Plovers are unique because their chicks will be mobile and able to feed themselves within hours of hatching. The chicks will not be confined to a particular area, and will still be vulnerable to predation and disturbance prior to fledging. American Oystercatcher chicks are still dependent on their parents for food, and they also don’t remain in the nest-site prior to fledging. In Cape May and other parts of New Jersey, the most common conservation technique used to protect these species is by closing off sections of the beach front for nesting birds (Maslo 2018).

Adult Least Tern

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Adult Piping Plover

Coastal birds contribute greatly to the beach and dune ecosystems by transferring nutrients between marine and terrestrial habitats and by acting as important predators in the food chain (Maslo 2016). Therefore, preserving these species is important to both maintaining biodiversity, but also to maintaining the health of our shoreline. That being said, it is important to be a mindful beach-goer by respecting restricted areas, staying on designated trails, keeping pets leashed, and being observant while enjoying the coast this summer!


 -Zoe Korpi, Intern at Cape May Whale Watch and Research Center

The Pennsylvania State University


Literature Cited

American Oystercatcher [Online Image]. (2017). Retrieved July 15, 2019 from,_NJ.jpg

Area in Cape Henlopen State Park where endagered birds nest [Online Image]. (2013). Retrieved July 15, 2019 from

Barlow, B. (2019). Cape May County expects steady tourism growth in 2019. Retrieved from

Brown, P. R. Sandy Point- Least Terns [Online Image]. (2011). Retrieved July 15, 2019 from Plover (male) [Online Image]. (2008). Retrieved July 15, 2019 from

Maslo, B. Leu, K., Pover, T., Weston, M. A., and Schlacher, T. A. 2018. Managing birds of conservation concern on sandy shores: How much room for future conservation action is there? Ecology and Evolution 8: 10976-10988.

Maslo, B., Schacher, T. A., Weston, M. A., Huijbers, C. M., Anderson, C., Gilby, B. L., Olds, A. D., Connolly, R. M., and Schoeman, D. S. 2016. Regional drivers of clutch loss reveal important trade-offs for beach-nesting birds. PeerJ: 1-23.

Pfister, C., Harrington, B. A., and Lavine, M. 1992. The impact of human disturbance on shorebirds at a migration staging area. Biological Conservation 60: 115-126. 

Spratt, A. (2015). Nesting season begins for threatened and endangered shorebirds along California coast.

Trepte, A. Black Skimmer Rynchops niger [Online Image]. (2015). Retrieved July 15, 2019 from

U.S. Fish & Wildlife Service. (2019). Piping plover fact sheet. Retrieved from