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OPM nest in Osterley Park
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OPM caterpillar in Osterley Park
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Horse-chestnut leaf miner damage in Osterley Park
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A glimpse of Osterley House across the lake
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Observatree volunteers on the move - Osterley
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Emerald Ash Borer - Osterley Park
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Box Tree moth damage - Osterley Park
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OPM and Silken Trail at Osterley Park
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Elm Zig-zig sawfly trace in Osterley Park
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OPM caterpillar in Osterley Park (2)
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OPM caterpillars in Osterley Park
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OPM caterpillars in Osterley Park (2)
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Possible old OCGW galls in Osterley Park (2)
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Possible old OCGW galls in Osterley Park
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Oriental Chestnut Gall Wasp gall in Osterley Park
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Oriental Chestnut Gall Wasp galls in Osterley Park