What Is An Entrance Feeder? A Guide To Its Simple Design And High Robbing Risk

In beekeeping, an entrance feeder is a simple device used to provide liquid food to a honey bee colony. It consists of two main parts: a container, typically a glass jar, that holds the liquid outside the hive, and a plastic or wooden tray that slides into the hive's entrance, allowing bees to access the food.

While entrance feeders are inexpensive and easy to monitor, their placement at the hive entrance makes them highly susceptible to attracting bees from other colonies, a serious risk known as robbing.

What is an entrance feeder? A Guide to Its Simple Design and High Robbing Risk

How an Entrance Feeder Works

An entrance feeder, also known as a Boardman feeder, operates on a simple gravity and vacuum principle. Its straightforward design makes it a common choice for new beekeepers.

The Core Components

The feeder has two parts. The first is an inverted jar (often a standard mason jar) with small holes in its lid, which holds sugar syrup or water.

The second part is a feeding tray that the jar screws into. This tray has a long, narrow platform that slides directly into the main entrance of the hive.

The Feeding Mechanism

As bees consume the liquid from the channel inside the hive, the vacuum seal in the jar is broken. This allows a small amount of liquid to drip from the jar onto the tray, refilling it for the bees.

The Primary Use Cases

Entrance feeders serve two distinct purposes, one of which carries significantly more risk than the other.

Providing Water

Bees require water to regulate hive temperature and humidity, and to dilute honey for feeding larvae. An entrance feeder is an excellent, low-risk tool for providing a clean water source, especially in early spring.

Supplemental Syrup Feeding

The more common use is feeding sugar syrup. This is done to support a new colony, help a weak hive build up strength, or provide food during a nectar dearth when natural forage is scarce.

Understanding the Trade-offs

The simplicity of the entrance feeder comes with significant advantages and critical disadvantages that every beekeeper must weigh.

Pro: High Visibility

Because the jar is outside the hive, you can see the liquid level at a glance. This allows you to monitor consumption rates and know exactly when to refill it without disturbing the colony.

Pro: Low Cost and Ease of Use

Entrance feeders are among the cheapest feeders available. Refilling is fast and simple—you just unscrew the old jar and screw on a new one.

Con: High Risk of Robbing

This is the feeder's most significant drawback. The external placement and scent of sugar syrup can easily attract robbing bees from stronger, nearby hives. This can trigger a frenzy where the robbing bees invade the hive to steal its resources, often resulting in the death of the colony.

Con: Limited Capacity

Most entrance feeders use a standard quart jar. For a growing colony in need of substantial feeding, this small volume requires frequent refilling, sometimes daily.

Making the Right Choice for Your Bees

Your decision to use an entrance feeder should be based on your specific goal and your awareness of the risks involved.

If your primary focus is providing a clean water source: An entrance feeder is an excellent and safe choice.
If your primary focus is feeding syrup to a weak or new colony: An internal feeder (like a frame or top-hive feeder) is a much safer option that eliminates the risk of robbing.
If you must use an entrance feeder for syrup: Do so with extreme caution, ideally when no other hives are nearby, and monitor constantly for signs of robbing bees at the entrance.

Choosing the right feeder is about balancing convenience with the long-term security and health of your colony.

Summary Table:

Aspect	Key Takeaway
Primary Use	Feeding liquid (sugar syrup or water) to a bee colony.
Best For	Providing a clean water source; syrup feeding only with extreme caution.
Main Advantage	Inexpensive and easy to monitor without opening the hive.
Biggest Risk	High potential to attract robbing bees from other colonies.
Recommended Alternative	Internal feeders (frame or top-hive) for safer syrup feeding.

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