1.   This beetle discharges a very hot fluid from a special gland at potential predators.

2.   The most widespread plant feature that attracts ants, however, is extrafloral nectar, produced from special glands.

3.   They no longer rely on outside air to fill the bladder, but have special glands for manufacturing gas.

4.   Other swifts also use salivary fluids from special glands to glue nests together and attach them to walls.

5.   These deer have special glands on their feet that, Wood said, secrete compounds with antibiotic properties.