  Giant radio galaxies (GRGs) are radio galaxies that have projected linear
extents of more than 700 kpc or 1 Mpc, depending on definition. We have carried
out a careful visual inspection in search of GRGs of the Bootes LOFAR Deep
Field (BLDF) image at 150 MHz. We identified 74 GRGs with a projected size
larger than 0.7 Mpc of which 38 are larger than 1 Mpc. The resulting GRG sky
density is about 2.8 (1.43) GRGs per square degree for GRGs with linear size
larger than 0.7 (1) Mpc. We studied their radio properties and the accretion
state of the host galaxies using deep optical and infrared survey data and
determined flux densities for these GRGs from available survey images at both
54 MHz and 1.4 GHz to obtain integrated radio spectral indices. We show the
location of the GRGs in the P-D diagram. The accretion mode onto the central
black holes of the GRG hosts is radiatively inefficient suggesting that the
central engines are not undergoing massive accretion at the time of the
emission. Interestingly, 14 out of 35 GRGs for which optical spectra are
available show a moderate star formation rate. Based on the number density of
optical galaxies taken from the DESI DR9 photometric redshift catalogue, we
found no significant differences between the environments of GRGs and other
radio galaxies, at least for redshift up to z = 0.7.
