Hawaii Invasive Species Council

By the Numbers: A Snapshot from FY25

In fiscal year 2025 alone, 643pest.org received more than 1,500 pest reports statewide, representing over 100 unique species. Nearly half of those reports were for pests already considered widespread and resulted in direct community guidance, while others were forwarded to response agencies such as HDAB, DLNR, and Island Invasive Species Committees for follow-up.

Major reporting spikes over the years — such as those tied to Coconut Rhinoceros Beetle — illustrate how awareness and visible impacts influence reporting trends.

Explore full statewide metrics on the General Dashboard →

Reading the dashboard with response in mind

Pest report trends often mirror the general spread of a pest as shown in the invasion curve. In many cases, species are first noticed only after they have begun rapid growth and spread — well past the window when early detection and low-cost eradication are possible.

How to Read the Trends: The Invasion Curve

Invasive species growth and spread often follow a predictable pattern known as the invasion curve.

The Invasion Curve, adapted from Invasive Plants and Animals Policy Framework/State of Victoria, Department of Primary Industries, 2010, Public Domain, https://www.fws.gov/media/invasion-curve

At first, populations are small and difficult to notice. During this early stage, detection and eradication are most effective and lowest cost. Tools such as surveys and monitoring traps are often used to find these “needles in a haystack.”

As time goes on, species spread, become more visible, and impacts increase. This is generally when people tend to notice a new plant, animal, or insect. Unfortunately, this often means the species has already entered the containment phase, where eradication becomes much harder or no longer possible. At this stage, efforts shift toward protecting ecologically, agriculturally, culturally, or financially significant areas.

Kilo, the practice of careful observation and awareness of the world around us, becomes essential. By practicing kilo and noticing changes in landscapes, gardens, parks, and neighborhoods, community members play a critical role in detecting new species and emerging populations early.

So what’s the point of reporting if an organism is already widespread?

Reports still matter. Submissions can trigger identification support, follow-up questions, and referrals to response partners when action is needed. They also act as a “smoke alarm,” showing where impacts are being felt and where communities can work together on management and in some cases, helping detect new populations that can still be controlled.