Syzygium (now including the previously-named Waterhousea and Acmena genera), often referred to as lilly pillies, are one of the most widely planted native genera in Australian landscapes. Used for hedging, screening, and ornamental features, they’re appreciated for their dense foliage, colourful new growth, fuzzy flowers and edible berries. But what do they offer urban fauna? Let’s break it down.
Waterhousea floribunda ‘DOW20’ PBR Trade Name Sweeper®.
Nectarivorous Birds
Yes – High Value
Syzygium flowers are a warm season boon for pollinating birds and insects, and will often take over in summer where Callistemon spp. finish flowering. I’ve noticed Acmena (syn. Syzigium) tends to start a bit earlier in spring than other lilly pillies like S. australe which I’ve noticed tends to flower a bit later toward the end of spring into summer.
Fruit Eating Birds
Yes – Strong Value
This is another area Syzygium really shines. The fleshy, brightly coloured berries are a favourite of fruit-eating birds such as figbirds, currawongs, and many parrots. These fruits provide a reliable sea-sonal food source in urban environments, supporting avian biodiversity.
Seed Eating Birds
Probably Not – Likely Low Interest
The seeds inside the fleshy fruit aren’t commonly targeted by granivorous birds, and there’s little evidence that Syzygium seeds are a significant food source in their own right as they are encapsuled within edible fruit and designed to survive the digestive tract. Seed-eating birds likely benefit more indirectly through insect presence or habitat. Try adding Chrysocephalum and Cenchrus.
Insectivorous Birds
Yes – Especially During Flowering and Around Infested Plants
The dense foliage of Syzygium provides good cover for insects, including both native and introduced species. Insectivorous birds may forage for beetles, psyllids, and other small prey among the leaves, especially if the plant is in full bloom or hosting an active infestation of so-called ‘pests.’ If you wish to avoid psyllids, opt for Straight and Narrow™ Syzygium which is highly resistant.
Pollen Feeding Insects
Yes – Particularly When Mass Flowering
Syzygium flowers are open and accessible to a range of pollen-feeding insects. Native bees, beetles, and beneficial flies often visit. Consider adding complementary plants like native grasses or Melaleuca.
Syzygium australe ‘SAN01’ PBR Trade Name Straight and Narrow™.
Nectar Feeding Insects
Yes – Particularly When Mass Flowering
Bees, butterflies, and other nectar-loving insects will visit Syzygium flowers, particularly when plants flower prolifically. The presence of multiple shrubs or trees in a single landscape can amplify their ecological draw. Lilly pillies tend to flower in summer, so adding Callistemon for spring, Correa alba for autumn/winter and Grevillea for winter/spring provides resources for the whole year.
Buzz Pollinated Flowers
No – Not Buzz-Pollinated
Syzygium doesn’t require buzz pollination. Pollen is freely available to visiting insects and birds, making it accessible to a broad range of pollinators without specialised behaviour. AddDianella .
Habitat and Larval Host
Unknown – Some Potential
While there’s limited data on beneficial insect larvae using Syzygium, there are some sources that list it as a host plant for Lepidoptera (moth/butterfly) larvae. With that being said, the main herbivores I’ve seen on the genus are psyllids and calypso beetles which are generally seen as highly undesirable. If you’d like to support butterflies and moths, try adding native grasses and strappy plants .
Native Herbivorous Insects – A Note for Maintenance
Syzygium can host native herbivores, most notably the lilly pilly beetle and lilly pilly psyllid, which may cause cosmetic damage (chewed leaves, pimpling, or leaf curling). While not generally a threat to plant health, these insects can be an issue in formal plantings or commercial landscapes with high aesthetic expectations. Beneficial insects and birds may assist in natural control if the system is allowed to balance itself. You’re already on the way to solving this issue by valuing biodiversity, however opting for naturally resistant varieties like Straight and Narrow™ Syzygium , which is naturally resistant to psyllids, is a good genetic control within an Integrated Pest Management (IPM) plan.
Final Thoughts for Specifiers
Syzygium offers solid ecological value in urban settings, particularly for fruit-eating birds and generalist pollinating insects and birds. It’s an ideal backbone plant for creating structural habitat, with bonus benefits when planted at scale. To maximise its value, combine with insect-attracting understorey species and consider including a few other shrubs and trees from diverse genera, families, and orders.
Browse Ozbreed’s lilly pillies: https://www.ozbreed.com.au/plant-ranges/native-shrubs-groundcovers/#lilly_pilly
https://www.ozbreed.com.au/plant-ranges/ozbreed-advanced-trees/
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