A Detailed Guide to Conducting Honey Bee Hive Inspections

Timing and Environmental Conditions

The timing of an inspection is critical for the welfare of the colony. In the UK climate, you should only open a hive when the ambient temperature is at least 14 to 15 degrees Celsius. Opening a hive in colder temperatures can chill the brood, potentially leading to the death of developing larvae. Ideally, choose a bright, calm day between 11:00 and 16:00. During these hours, many of the older foraging bees will be out in the field, meaning there are fewer bees in the hive to manage and they are generally less defensive.

Avoid inspecting during rain, high winds, or when a thunderstorm is imminent. Bees can become highly defensive in these conditions as they sense changes in atmospheric pressure. During the peak of the season, usually from May to July, inspections should occur every seven to ten days to keep pace with the swarm cycle. In the early spring or late autumn, inspections should be less frequent and much briefer to prevent heat loss. Always consider the local forage availability; if there is a nectar dearth, bees may be more prone to robbing and more irritable during inspections.

Before you approach the apiary, ensure you have a clear plan of what you intend to achieve. Are you checking for queen cells, assessing honey stores, or performing a varroa mite count? Having a specific goal helps you work efficiently. Ensure your bee suit is clean, as the scent of previous stings or crushed bees can trigger defensive behaviour. Check that your smoker is lit and producing a cool, thick white smoke rather than hot, thin blue smoke which can singe the bees' wings.

• Wait for temperatures to exceed 14 degrees Celsius.
• Inspect between late morning and mid-afternoon.
• Avoid windy, rainy, or thundery weather.
• Maintain a seven to ten day schedule during swarm season.
• Plan your specific objectives before opening the hive.

The Systematic Inspection Procedure

Approach the hive from the side or rear to avoid blocking the flight path of returning foragers. Begin by puffing a small amount of smoke into the entrance and under the roof or crown board. Wait for approximately two minutes; this allows the bees to ingest honey, which makes them calmer and less likely to sting. Gently remove the roof and place it upside down on the ground to serve as a stand for the supers if necessary. Use your hive tool to carefully pry up the crown board, puffing a little smoke across the top bars of the frames as you do so.

If the hive has supers, remove them and place them on the upturned roof, covering them with a spare crown board to prevent robbing. You are now looking at the brood box. Start by removing the outermost frame, which is often less crowded. This creates space to move the remaining frames without crushing bees. Hold the frame by the lugs and lift it vertically. Examine both sides by rotating the frame like a page in a book, keeping it over the hive so any falling bees land back inside. Work your way through the brood box, moving each frame into the empty space created by the first removal.

As you move through the frames, observe the bees' behaviour. They should be relatively calm and moving purposefully. If they begin to boil over the top bars or fly aggressively at your veil, use a small amount of smoke to move them down. Always handle frames gently and avoid sudden movements. Once you have finished the inspection, replace the frames in their original order and orientation, unless you have a specific management reason to move them. Ensure the frames are pushed tightly together to maintain the correct bee space, then replace the crown board and roof.

• Approach from the side to keep the flight path clear.
• Smoke the entrance and crown board then wait two minutes.
• Remove the outermost frame first to create working space.
• Hold frames vertically and rotate them like a book page.
• Maintain the original frame order when closing the hive.

Identifying Health and Productivity Indicators

The most vital part of the inspection is assessing the brood nest. You do not always need to see the queen to know she is present; finding eggs is sufficient evidence. Eggs look like tiny grains of rice standing at the bottom of the cells. If you see eggs, a queen was present within the last three days. Look for a solid, wall-to-wall brood pattern. A 'pepper-pot' pattern with many empty cells can indicate a failing queen or a disease issue. Healthy larvae should be pearly white and C-shaped; any discolouration, such as yellowing or browning, should be investigated further.

Distinguish between worker brood, which has flat cappings, and drone brood, which has raised, bullet-shaped cappings. Check for the presence of queen cells, particularly along the bottom or sides of the frames. If you find queen cells containing larvae and royal jelly, you must take immediate action to manage the swarm impulse. This usually involves performing an artificial swarm or splitting the colony to prevent the loss of half the bees. If the queen is already gone, you may need to select the best queen cell and remove the others to prevent multiple casts.

Assess the food stores by looking at the top corners of the brood frames. There should be a 'rainbow' of honey and pollen surrounding the brood. In the UK, beekeepers must be vigilant during the 'June Gap'. This is a period of nectar shortage between the end of spring blooms, like oilseed rape, and the start of summer flowers, such as lime or clover. During this gap, colonies can starve quickly, so ensure there are at least two full frames of honey at all times. Finally, look for signs of pests. If you suspect a notifiable disease such as European or American Foulbrood, you are legally required by the Bee Diseases and Pests Control (England) Order 2006 (and equivalent legislation in Scotland and Wales) to stop the inspection, close the hive, and contact the National Bee Unit or your local Bee Inspector immediately.

• Look for eggs to confirm the queen's recent presence.
• Check for pearly white, C-shaped larvae.
• Monitor for queen cells and perform an artificial swarm if necessary.
• Monitor food stores closely during the June Gap nectar shortage.
• Ensure at least two frames of honey stores are present.
• Report suspected Foulbrood to the National Bee Unit immediately.

Checklist

• Ensure the smoker is lit and fueled with enough material for the duration.
• Check that your bee suit is fully zipped and well-fitting.
• Confirm the ambient temperature is above 14 degrees Celsius.
• Prepare your hive tool and any necessary replacement frames.
• Verify you have a method for recording your findings immediately.
• Check for the presence of eggs or the queen herself.
• Assess the quantity of honey and pollen stores.
• Inspect for signs of swarm cells or queen cups.
• Look for symptoms of pests or brood diseases.
• Ensure frames are pushed back together to maintain bee space.

Questions people ask

How often should I inspect my bees?

During the peak spring and summer months in the UK, you should inspect every seven to ten days to monitor for swarm cells. In early spring and autumn, once every two to three weeks is usually sufficient, provided the bees have enough food.

What should I do if I cannot find the queen?

Do not worry if you cannot spot the queen, as she can be elusive. As long as you see fresh eggs (one per cell, positioned centrally), you can be confident she was there within the last three days and the colony is queen-right.

Why are my bees suddenly aggressive during an inspection?

Aggression can be caused by poor weather, a lack of nectar (a 'dearth'), or the scent of a previous sting. It can also indicate that the colony has become queenless or is being bothered by pests like wasps or badgers.

How much smoke should I use?

Use smoke sparingly. A few puffs at the entrance and across the top of the frames is usually enough to calm the bees. Over-smoking can cause the bees to panic and run across the frames, making the queen harder to find.